Synonym of unbreakable

adj.

impossible to break especially under ordinary usage

durable indestructible infrangible resistant shatterproof toughened non-breakable adamantine armoured everlasting hard-wearing imperishable lasting long-lasting nonbreakable rugged solid stout strong sturdy armored brass-bound firm hard heavy-duty incorruptible indissoluble invulnerable perdurable permanent resilient tight tough unshakable unyielding made to last reinforced enduring strengthened steely robust impenetrable rigid rock-solid hardened cast-iron inured inflexible secure sound vigorous fortified nonbreaking hardy abiding rock-hard eternal hard-bitten undestroyable as hard as stone as hard as iron hard as nails infallible stable reliable established airtight unassailable fixed dependable adamant steady substantial impregnable safe well built lusty invincible stiff well-made well-built well fortified tried-and-true well-founded seasoned iron heavy cohesive really hard safety concrete flinty binding inseparable immortal inextinguishable indelible nonperishable unfading undying deathless hearty perennial ineradicable endless bulletproof steel-clad covered very hard forceful flourishing inviolable well made storm-resistant unattackable fast stormproof well defended bombproof well-armed well-protected impassible immovable knockabout well protected unchangeable perpetual undestructable unruinable irrefrangible inextirpable irrefragable inexterminable immutable unwreckable unalterable protected shielded steel galvanized galvanised tempered thick steel-plated ironclad heavily clad leathery rock hard fit brawny strapping stalwart mighty dense steeled moulded healthy molded conditioned withstanding absolute tough as nails categorical unpliable unmalleable unconditional indurated rocklike set solidified impermeable indurate rocky stony stiffened unquestionable incontrovertible frozen concentrated rock-like renitent compelling effective cogent indubitable set in stone well-defined well-established well founded well constructed well-constructed impervious staunch steadfast resolute waterproof strongly made unshakeable tenacious unwavering windproof unconquerable unbeatable indomitable trustworthy constant responsible secured tried riveted deep-rooted insuperable immune honourable honorable determined unstoppable insurmountable true upright untouchable built to last faithful unfaltering unfailing anchored rooted taut sure braced cemented trustable long-lived long-standing nailed calculable snug insusceptible moored tightened continuing honest jammed fastened trusty weatherproof lifelong lodged stuck repellent consistent bound proof against powerful impassable safe and sound serviceable uncompromising emphatic wear-resistant shellproof inexpugnable unrelenting assertive aggressive purposeful foolproof clenched clinched bold zealous tied vice-like risk-free immalleable impliable low-risk holy sacred hallowed sacrosanct surviving perduring diuturnal long-continued inspiring distinctive individual water-resistant unaffected as hard as a rock recognized attested riskless well-defended compact granite clasped fitted certain locked error-tolerant fixed firmly insensitive reputable proven remaining long-established long-running done up buttoned down loyal good straightforward trusted never-failing unsurmountable unsusceptible to unaffected by repellent of impervious to invulnerable to immune to solid as a rock prevailing persistent persisting credible predictable unswerving unflinching dauntless indefatigable unbending ongoing time-honoured traditional long-term fortress-like sterling recognised committed invariable irrepressible undefeatable supreme irresistible tried and true tried and tested tried and trusted imperviable to safe as houses invariant irreversible changeless characterful balanced equable decided incommutable settled embedded stationary motionless treated proofed rainproof imperviable inevitable inalterable hard-and-fast unvarying childproof soundproof fireproof tamper-proof leakproof well balanced well-balanced proof unmovable unmodifiable unchanged damp-proof wedged unmoving welded unfluctuating able to withstand mounted bolted soldered screwed irremovable immobile hard and fast

impenetrable impervious impermeable dense solid thick hard impassable impregnable inviolable unpierceable indestructible puncture-proof unyielding closed impassible invulnerable resistant sealed tight unassailable unattackable waterproof hermetic safe secure bulletproof close compact firm hermetically sealed murky substantial unpiercable tightly packed fortress-like watertight invincible strong immune airtight inaccessible water-resistant imperviable unconquerable insusceptible unbeatable rainproof proof indomitable shut tough blocked obstructed tamper-proof protected fastened water-repellent unaffected locked insuperable unstoppable insurmountable damp-proof unreceptive untouchable obdurate stout rigid fortified repellent resilient well fortified well defended safe and sound proof against unaffected by stopped up unnavigable padlocked cinched flinty rock-hard undefeatable sacred hallowed sacrosanct holy coated vacuum-packed wrapped fixed taped up stuck down unshakable immovable nonporous well-defended leak-proof shut tight holdable untouched unmoved unswayable protectable unfeeling impassive unapproachable unwavering unmovable unbending adamant defensible sturdy hardy repellent of impervious to unsusceptible to invulnerable to immune to sound hardened able to be protected insensitive unsusceptible unshakeable imperviable to powerful lost unimpressionable not subject to unresponsive clumped plugged bolted smothering snapped proofed treated untouched by unmoved by weatherproof soundproof fireproof childproof windproof leakproof bombproof able to withstand inalienable inviolate unsurpassable unflinching indefatigable irrepressible irresistible supreme unchallengeable impossible overwhelming unalterable unimpeachable defended hopeless unthreatened challenging immortal tenable unkillable respected above criticism sanctified enduring intangible impalpable imperceptible indefeasible undefeated intractable innate inexpugnable unattainable defendable set apart risk-free low-risk matchless shielded guarded riskless unsurpassed peerless certain steady iron unmatched absolute unsurmountable excellent outstanding dauntless intemerate unexcelled divine uninfringeable unbreachable resisting renitent no-win unmasterable ineluctable not beatable staunch resolute steadfast not a prayer forget it no way stalwart intransigent set lionhearted brave determined plucky fearless intrepid inflexible heroic valiant untameable willful stubborn ruthless gritty obstinate dogged doughty mettlesome steely courageous spirited pertinacious strong-willed strong-minded stout-hearted

undecryptable uncrackable

airtight incontestable indisputable sound undeniable unquestionable foolproof irrefutable sure absolute certain guaranteed incontrovertible positive safe unassailable flawless infallible sure-fire watertight conclusive indubitable beyond dispute beyond doubt beyond question invulnerable strong without loopholes perfect unfailing effective reliable never-failing unerring dependable efficacious trustworthy tested goofproof secure never failing tried faultless fail-safe idiot-proof tried and true tried and tested convincing decisive definite final definitive unarguable clinching unequivocal unanswerable unambiguous unmistakable ultimate clear categorical irrefragable demonstrative beyond a shadow of a doubt undebatable proven inarguable clear-cut self-evident evident compelling obvious plain demonstrable emphatic not in doubt unchallengeable accomplished apodictic uncontroversial firm impregnable straightforward transparent undoubted real true palpable observable patent manifest express marked pronounced accepted acknowledged accurate sure thing as plain as a pikestaff staring one in the face no mistake established unshakable unequivocable nailed-on surefire uncontestable authentic material nailed down no two ways about it credible plausible telling powerful persuasive cogent deciding last veridical unfabled double-checked actual impressive authenticating irrefrangible determinative precise irrevocable unconditional revealing settling resolving determinant that's a fact no ifs ands or buts about it open and shut flat-out what you see is what you get litmus test all out straight out validating supreme determined ascertained known provable set confirmable predestined authoritative establishable destined fixed undisputable verifiable genuine hard on ice salted away having down pat in the bag

inviolable sacrosanct sacred holy hallowed untouchable inalienable unalterable unchallengeable absolute impregnable unassailable intemerate divine firm indestructible inviolate unbreachable uninfringeable invulnerable sanctified secure safe venerated immune blessed consecrated revered blest venerable consecrate sacral reverenced invincible protected unimpeachable unaltered unchanged infrangible defended unthreatened impenetrable unconquerable strong unattackable respected unbeatable dedicated stout religious indomitable well fortified well defended heavenly godly enshrined supernatural anointed unprofane set apart intangible impalpable imperceptible godlike insuperable bulletproof unstoppable insurmountable unshakable immovable solid unyielding fortified shielded guarded well-defended spiritual immortal exalted devotional immaculate ecclesiastical sacramental theistic saintly pure pious safe and sound eternal numinous solemn devoted to God dedicated to God entire unbroken intact perfect honoured reverend worshipped beatified honored worshiped deified devout churchly righteous sainted canonical moral prayerful church saintlike virtuous scriptural apostolic angelic god-fearing priestly good faithful pietistic devoted reverent clerical glorified innocent upright theological orthodox sacerdotal ministerial believing ecclesiastic unworldly spotless doctrinal humble seraphic just chaste clean pastoral non-secular prelatic parsonical pietistical faultless untainted uncorrupt sublime undefiled God-fearing deistic sectarian ecclesial bible biblical ritual ordained canonized non-temporal churchy sinless pontifical papal episcopal canonised born-again reverential evangelic Christian otherworldly ethereal dogmatic hierological metaphysical mystical theologic cherished reserved messianic special adored evangelical churchgoing dutiful blameless celestial deific purified classical prophetic ethical clerkly vicarial schismatic moralizing smug moralising worshipful worshiping ceremonial uncorrupted stainless irreproachable beatific worthy guiltless hieratic rectorial presbyteral among the angels upstanding seraph worshipping theocratical cleric monastic monkish rabbinical parsonish parochial diaconal full of good works supplicant supplicating pleading beseeching soliciting entreating imploring suppliant supplicatory

binding indissoluble irrevocable mandatory obligatory unalterable compulsory conclusive imperative necessary permanent required requisite bounden essential counted upon incumbent on forced peremptory involuntary unavoidable demanded incumbent nonelective inescapable de rigueur prescribed compulsatory compelling enforced urgent stipulated coercive necessitous fixed statutory imposed imperious pressing constrained coerced contractual ordained compelled critical needed exacted exigent indispensable needful prerequisite integral must-have called for enforceable set unwilling unconsenting reluctant grudging begrudging against one's will will-less against one's wishes commanding irremissible dictated importunate instant dire emergent clamant acute crying burning called-for overriding lasting necessitated obliged impelled vital pressed invoked charged executed advocated sanctioned established prevalent enjoined kept enduring eternal key important abiding imperishable solid inseparable consequential pivotal intrinsic central carried out forced upon all-important core OB appropriate rudimentary innate inherent substantive high-priority firm everlasting indestructible incorruptible quintessential expedient decisive prime momentous wanted name of game life-and-death fundamental specified desired preferred of the utmost importance of the essence cardinal significant all important elementary bottom-line paramount basic of great consequence crucial proper principal chief recommended vitally important pre-eminent the law primary major main elemental constitutive capital foremost underlying leading serious focal meat-and-potatoes dominant radical constitutional staple salient rudimental basal first predominant preeminent great material structural beginning introductory foundational premier root ingrained meaningful big influential heavy grave prominent primitive determining abecedarian supreme particular expected grand number one master natural primal anticipated strategic nitty-gritty deciding arch top deep-seated very important considerable outstanding immanent weighty initial final far-reaching looked-for characteristic telling original sovereign profound organic overbearing ruling native immediate overmastering true inborn inbred special sovran numero uno earth-shattering life-or-death determinative congenital high much needed fatal connate intense powerful indigenous hardwired engrained conspicuous deep-rooted uppermost built-in hard-wired deep-down heavy-duty earnest high-level big-time monumental life-preserving life-sustaining lacking hoped-for foreseen awaited lacked king easy basilar lowest bread-and-butter right-hand lead everything operative keynote overruling climacteric standard underlined climactic nuclear of vital importance causal desperate predestined foreordained inevitable fateful doomed destined business-critical mission-critical name-of-the-game world-shaking number-one coal-and-ice a matter of life and death emergency drastic sore impelling extreme primordial constituent definitive absolute last settling clear in demand popular real terrible driving parlous component connected genuine unlucky elevated maximum indelible large-scale historic germane tough pertinent substantial extensive dynamic ponderous invaluable emphatic head ineradicable ingrain ineffaceable at the heart of hereditary intimate indwelling inmost connatural deep sustaining axiomatic axiological ultimate supporting substratal substrative grass-roots theoretical bottom underived groundlaying top-priority life and death very great in one's blood demanding right correct fitting constraining prevailing prior highest greatest controlling suitable chosen intended star stellar No. 1 clamouring hurry-up persuasive clamoring requiring obliging heat-on irresistible exacting claiming distressing forcing unyielding selected accurate express exact rightful distinguished seminal now or never noted trusted reputable noteworthy celebrated illustrious sought after major league high profile high-up notable honourable honoured well known mighty top-notch big time noble big-league top-ranking high-powered honorable highly regarded puissant major-league superior eminent high-ranking skookum top-drawer of high standing honored big league most important most prominent most influential

adamantine obstinate wilful unbending adamant dogged firm headstrong immovable implacable inflexible intransigent mulish obdurate pertinacious perverse stubborn uncompromising unyielding opinionated rigid willful unbendable unrelenting bullheaded hard hardened hardheaded inconvincible inexorable ossified pat pigheaded relentless uncompliant incompliant remorseless stiff-necked hard-nosed self-willed self-opinionated deaf to reason stiff unmalleable fixed tight unalterable intractable steadfast determined recalcitrant cussed refractory persistent tenacious unflinching resolved defiant unshakable unpersuadable contumacious unmanageable steely unshakeable unreasonable uncooperative persevering cantankerous stroppy froward balky difficult bolshie contrary strict stringent dogmatic indomitable heady opinionative unmoved indurate restive convinced contrarious taut inelastic strong-minded single-minded with one's toes dug in locked in cross-grained dead set on strong-willed wrong-headed bloody-minded stubborn as a mule with one's feet dug in bull-headed iron-willed pig-headed hard-line set rigorous final solid compact tense stiffened flinty unflexible immalleable impliable unmoving settled unchanging fast inexpugnable dyed-in-the-wool hard-and-fast ironclad undeviating determinate iron-fisted set in stone unsupple stiff as a board chiseled chiselled solidified non-flexible resolute unwavering purposeful staunch disobedient wayward insistent indefatigable obstreperous insubordinate tough ungovernable unfaltering rebellious unruly unswerving stalwart unaccommodating unflagging earnest dedicated intent rebel uncontrollable untoward decided untiring strong tireless committed recusant rock-ribbed awkward steady driven fractious importunate forceful mutinous spirited assertive gritty assiduous troublesome undisciplined bound dead set unhesitating thrawn ruthless obstructive disobliging undaunted resistant unshaken decisive vigorous tiresome unhelpful bold incorrigible diehard wild demanding constant aggressive renitent hard-core enthusiastic grim harsh ardent gutsy inveterate zealous mettlesome bent hardline fanatical plucky unsparing pushy pervicacious patient emphatic annoying full of determination diligent avid ornery disorderly serious perseverant unremitting unadaptable fierce rooted hard and fast sedulous unmovable iron bent upon entrenched bent on pitiless definite imperious deliberate severe vexatious devoted keen obsessive brave exigent ingrained stern sure clamorous courageous deep-rooted eager true compulsive deep-seated merciless truculent feisty unswayable quarrelsome pressing domineering stout-hearted certain militant trying dour burning unpredictable incurable unwilling confirmed turbulent do-or-die ambitious exacting established indocile bound and determined enduring self-assertive incontrollable stout hell-bent on hell-bent upon valiant focused motivated unappeasable obsessed intolerant insurgent immutable spunky enterprising bred-in-the-bone hidebound rugged deep-dyed active narrow-minded urgent energetic unchangeable faithful tyrannical persisting intense die-hard four-square set in one's ways cast-iron entreating hanging tough out positive purposive passionate focussed fervent noncompliant arbitrary clamant disaffected manful go-getting bulldog authoritarian critical biased hard as nails stony unamenable imperative overbearing illiberal unresponsive strenuous invariable dictatorial extreme seditious draconian dire undisciplinable argumentative deep sturdy bellicose stable insubmissive oppressive intrenched industrious aspiring thirsty long-standing inspired negative hooked pugnacious hungry desirous dissentient mean unflappable fiery cruel radical dissident nonconformist ineradicable loyal cynical not giving an inch monomaniacal closed-minded unswervable seasoned unrepentant indurated explicit violent impulsive doctrinaire unsympathetic unforgiving hardy deaf meaning business standing one's ground blinkered belligerent self-starting hard-driving self-confident goal-oriented contentious haughty capricious devout hell-bent self-driven continuous chronic habitual exasperating nagging hostile antagonistic insolent irremovable peevish unassailable crying non-compliant challenging secure fervid resisting picky obstinately disobedient set on factious alienated resilient fussy irrepressible locked uptight disciplinary insuppressible unrestrainable impassioned sworn compelling gung ho as stubborn as a mule adverse reckless erratic ferocious frozen perfectionist unfailing indelible immobile disputatious striving high-pressure ill-natured crabby scrappy obsessional fixated intrepid untameable possessive wholehearted absolute hardhearted querulous concrete autocratic sticky prickly unstoppable irritable delinquent impervious heedless brick-wall touchy addicted peremptory possessed heavy-handed no-nonsense callous vehement hypercritical chippy formidable hard to please lawless out of control hang tough tough nut insurrectionary irredeemable perennial lifelong high-powered assured progressive pioneering hard-headed heroic unabated doughty deep-set confident thick-skinned uncharitable hard-hearted threatening hard-bitten hard to handle long-established accustomed habituated permanent hard to satisfy self-asserting self-seeking get up and go stop at nothing power-hungry dug in standing pat over-particular stand pat well-set two-fisted mean business hard-shell eager beaver power-loving as tough as old boots high-reaching rough hell bent on stupid irrational illogical repeated shortsighted blind unbudgeable estranged irreconcilable morose incessant impudent unconverted unreformed prejudiced mullish shrewish firmly-based unreceptive boneheaded unsubduable inconsiderate unsupportive aloof proud durable petrified disruptive anarchic troublemaking insoluble thorny unpliable problematic knotty hardboiled buckled down stanch with a will of one's own determined to have one's own way never-tiring unimpressible well-founded unfavorable unfavourable cross petulant fickle hellbent cohesive game impertinent bullhead uncompassionate unemotional brassbound pathological fossilized bony rigidified true-blue responsible tried tried-and-true pious coherent unvacillating pleading cocksure opposing withstanding unbeatable invincible obscene pornographic X-rated cold fish proof against persuasion unforgetful uncontainable forbidding close-minded categorical great unconquerable impassive instant emergent acute necessitous unvarying beseeching begging inalterable fossilised tough nut to crack stony-hearted unimpressionable unregenerate pounding mortal impossible unbearable undependable intolerable adventurous unwaivering locked-in out of hand jelled flat set-on one-sided iron-jawed robust persuasive preconceived puritanical unmodifiable quiescent toughened competitive disturbing solicitous suppliant overeager harassing unplacatable iron-handed unmollifiable inescapable unpacifiable sagacious not cooperative crisp naughty errant immoral aberrant telelogical playing hard ball calculated be out for blood nose to the grindstone good dynamic thrusting unsurpassable impregnable invulnerable solid as a rock clear-sighted all out flat-out straight out disciplinarian drastic ascetical by the book astringent browbeating austere ascetic grave contrariant nonconforming discordant arsey paradoxical disagreeing stuffy unpermissive cutthroat sustained whole-hearted set in your ways lionhearted pesky vexing bloodthirsty fastidious boorish finicky powerful fit stick to guns set in concrete daring provocative audacious wrongheaded antipathetic inimical converse ineluctable do or die hold one's ground hold the fort sticking to one's guns hold the line dominant in earnest revolutionary intent on warlike gladiatorial brutal freaked like a loose cannon excited overwhelming beside oneself badly-behaved abandoned overpowering prevailing unqualified firm in spirit independent perceptive keen as mustard animated tough-minded resourceful take charge like a ball of fire on the make desiring success badly behaved confrontational fearless insurmountable bulletproof insuperable consistent going oafish bearish irascible discontented dissatisfied like death and taxes no going back necessary compulsory pushful hopeful malcontent disloyal tall in the saddle on one's mettle insistent on intent upon determined to committed to the idea of congenital self-indulgent full-blooded intensely competitive in-your-face fiercely competitive having killer instinct cut-throat dog-eat-dog hang-tough go for broke self-assured can-do self-possessed consumed compelled dissenting combative cramped complex bulky discommodious incommodious disagreeable undefeatable impassable tough as old boots red-blooded testy choosy snappy temperamental grumbly irritating impolite in for long haul through-and-through never-failing resounding reiterative monotonous authoritative bossy subversive overly solicitous abiding radicated long-lived continuing customary old usual like bad penny inbred innate long-lasting vexed captious disputative huffy delicate overcritical particular ungracious finical invidious fiendish sensitive crotchety uppity sour rude galvanized impelled high-handed nonmoving restless anarchistic warring armed treacherous sabotaging individualistic iconoclastic treasonable attacking induced frenzied judgmental disapproving unbudging sassy resistive disregardful cheeky dareful difficult to handle nonmotile pushed steered guided besetting galvanised immoderate infatuated thorough overexacting cavilling ready for a fight despotic brusque commanding immotile proved complete mad over-enthusiastic torrid thoroughgoing impenitent supreme unapologetic unashamed unreformable longtime quibbling disparaging sticklerish faultfinding overscrupulous needy hairsplitting caviling censuring cavillous abrupt imperial magisterial summary brisk spoiling for a fight dotty frenetic crazy potty visionary nuts gung-ho inured staid negativistic averse loath reluctant indisposed hesitant tyrannous autocratical tyrannic masterful arrogant lordly overweening hearty demeaning carping censorious sicker urged on rabid perfervid bigoted wackadoodle overenthusiastic wackadoo passional lusty impetuous intemperate imprudent rowdy drunken rash forward bawdy riotous high-maintenance well established red-hot through and through all-consuming firmly established bona fide card-carrying well-established nuts for partial bugged raving feverish high on credulous fanatic undeniable turned on finished unquenchable bitter furious granite case-hardened unconcerned indifferent oblivious out of line fault-finding over-exacting anchored nailed quiet hitched situated attached stationary still located over-rigorous over-strict over-censorious unsentimental unhearing unmoved by made fast unfeeling compassionless desensitized soulless cold-blooded affectless slash-and-burn take-no-prisoners unmerciful ironhearted world-weary inhumane heartless pachydermatous insensitive insensate stonyhearted stoney inhuman unconcerned with insensible to unaffected by unconscious of impervious to dispassionate about oblivious to unresponsive to unaware untouched by indifferent to unaware of unmindful of unaffected heedless of to listen blind lacking sentiment hard-edged desensitised as hard as nails hard-shelled hard-boiled toughened by experience

indivisible amalgamated blended conjoined indissoluble inseparable undividable unified united impenetrable joined permanent unsplittable close intimate bosom devoted friendly chummy best good tight thick firm inward near confidential especial familiar fast buddy-buddy boon constant faithful inalienable loyal inseverable entwined interwoven intertwined whole secure integrated integral connected molded attached moulded as one joined at the hip tied up thick as thieves in each other's pocket as thick as thieves matey dear pally loving special palsy-walsy cozy cosy cherished valued treasured affectionate close-knit cordial personal sociable clubby congenial staunch enduring steady steadfast on good terms favourite favorite stable solid abiding unwavering dedicated unfailing trusty warm fresh dearest amiable neighborly neighbourly fond comradely companionable allied akin very dear reliable long-standing deep-rooted long-lasting durable regular nice nearest and dearest lasting amicable cliquey genial convivial affable binding eternal fixed clannish closely acquainted palsy easy gracious clubbable hail-fellow-well-met snug free-and-easy officious imperishable tight-knit on the best of terms well in close to devoted to hand in glove on friendly terms inseparable from true everlasting indestructible incorruptible on top of each other down-the-line avid ardent true blue devout unfaltering resolute true-blue dutiful truehearted flawless trustworthy dependable safe uncorrupted convincing balanced correct perfect sound undamaged vigorous compelling normal tried and true potent expedient well timed unspoiled unswerving influential tried and tested eatable committed trenchant persuasive felicitous unimpaired favourable unhurt well judged seasonable timely promising intact fit to eat undecayed well-timed unblemished uncontaminated favorable make good make good on something in good part

unbreakably unbreakfasted unbreathable unbreathably unbribable unbridle unbreachable unbranded unbraids unbraiding unbraided unbraid