impervious

• POS: Adjective
• HYPHEN: im=per=vi=ous

CIDE DICTIONARY

impervious, a. [L. impervius; pref. im- not + per through + via way. See Voyage.].

 Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.  [1913 Webster]
"This gulf impassable, impervious."  [1913 Webster]
"The minds of these zealots were absolutely impervious."

Syn. -- Impassable; pathless; impenetrable; imperviable; impermeable.

OXFORD DICTIONARY

impervious, adj. (usu. foll. by to)
1 not responsive to an argument etc.
2 not affording passage to a fluid.

Derivative

imperviously adv. imperviousness n.

Etymology

L impervius (as IN-(1), PERVIOUS)

THESAURUS

impervious

Philistine, airtight, ballproof, beyond reach, bombproof, bulletproof, burglarproof, callous, calloused, case-hardened, closed forever to, closed to, corrosionproof, dampproof, fire-resisting, fireproof, flameproof, flinty, foolproof, hard, hardened, hardhearted, hermetic, holeproof, impassable, impenetrable, impermeable, impersuadable, impersuasible, impervious to, inaccessible, indurated, inflexible, insensitive, inured, leakproof, lost to, noiseproof, nonpuncturable, obstinate, out of reach, pachydermatous, proof, proof against, punctureproof, resistant, rustproof, shatterproof, shellproof, soundproof, steeled against, steely, stony, thick-skinned, tight, un-come-at-able, unaccessible, unamenable, unapproachable, unattainable, unavailable, undiscoverable, ungettable, unimpressionable, uninfluenceable, unmovable, unobtainable, unpassable, unperforable, unpersuadable, unpierceable, unpliable, unprocurable, unreachable, unreceptive, unresponsive, unsecurable, unsuggestible, unsusceptible, unswayable, unyielding, watertight, weatherproof

ROGET THESAURUS

impervious

Obstinacy

N obstinacy, obstinateness, obstinacy, tenacity, cussedness, perseverance, immovability, old school, inflexibility, obduracy, obduration, dogged resolution, resolution, ruling passion, blind side, self-will, contumacy, perversity, pervicacy, pervicacity, indocility, bigotry, intolerance, dogmatism, opiniatry, opiniativeness, fixed idea, fanaticism, zealotry, infatuation, monomania, opinionatedness opinionativeness, mule, opinionist, opinionatist, opiniator, opinator, stickler, dogmatist, bigot, zealot, enthusiast, fanatic, obstinate, tenacious, stubborn, obdurate, casehardened, inflexible, balky, immovable, unshakable, not to be moved, inert, unchangeable, inexorable, mulish, obstinate as a mule, pig-headed, dogged, sullen, sulky, unmoved, uninfluenced unaffected, willful, self-willed, perverse, resty, restive, restiff, pervicacious, wayward, refractory, unruly, heady, headstrong, entete, contumacious, crossgrained, arbitrary, dogmatic, positive, bigoted, prejudiced, creed- bound, prepossessed, infatuated, stiff-backed, stiff necked, stiff hearted, hard-mouthed, hidebound, unyielding, impervious, impracticable, inpersuasible, unpersuadable, intractable, untractable, incorrigible, deaf to advice, impervious to reason, crotchety, obstinately, non possumus, no surrender, ils n'ont rien appris ne rien oublie.

Insensibility

N insensibility, insensibleness, moral insensibility, inertness, inertia, vis inertiae, impassibility, impassibleness, inappetency, apathy, phlegm, dullness, hebetude, supineness, lukewarmness, cold fit, cold blood, cold heart, coldness, coolness, frigidity, sang froid, stoicism, imperturbation, nonchalance, unconcern, dry eyes, insouciance, recklessness, callousness, heart of stone, stock and stone, marble, deadness, torpor, torpidity, obstupefaction, lethargy, coma, trance, vegetative state, sleep, suspended animation, stupor, stupefaction, paralysis, palsy, numbness, neutrality, quietism, vegetation, insensible, unconscious, impassive, impassible, blind to, deaf to, dead to, unsusceptible, insusceptible, unimpressionable, unimpressible, passionless, spiritless, heartless, soulless, unfeeling, unmoral, apathetic, leuco-, phlegmatic, dull, frigid, cold blooded, cold hearted, cold as charity, flat, maudlin, obtuse, inert, supine, sluggish, torpid, torpedinous, torporific, sleepy, languid, half-hearted, tame, numbed, comatose, anaesthetic, stupefied, chloroformed, drugged, stoned, palsy-stricken, indifferent, lukewarm, careless, mindless, regardless, inattentive, neglectful, disregarding, unconcerned, nonchalant, pococurante, insouciant, sans souci, unambitious, unaffected, unruffled, unimpressed, uninspired, unexcited, unmoved, unstirred, untouched, unshocked, unstruck, unblushing, unanimated, vegetative, callous, thick-skinned, hard-nosed, pachydermatous, impervious, hardened, inured, casehardened, steeled against, proof against, imperturbable, unfelt, insensibly, aequo animo, without being moved, without being touched, without being impressed, in cold blood, with dry eyes, with withers unwrung, never mind, macht nichts, it is of no consequence, it cannot be helped, nothing coming amiss, it is all the same to, it is all one to.

Closure

N closure, occlusion, blockade, shutting up, obstruction, embolus, contraction, infarction, constipation, obstipation, blind alley, blind corner, keddah, cul-de-sac, caecum, imperforation, imperviousness, impermeability, stopper, closed, shut, operculated, unopened, unpierced, imporous, caecal, closable, imperforate, impervious, impermeable, impenetrable, impassable, unpassable, invious, pathless, wayless, untrodden, untrod, unventilated, air tight, water tight, hermetically sealed, tight, snug.

Impossibility

N impossibility, what cannot, what can never be, sour grapes, hopelessness, impossible, not possible, absurd, contrary to reason, unlikely, unreasonable, incredible, beyond the bounds of reason, beyond the bounds of possibility, beyond the realm of possibility, from which reason recoils, visionary, inconceivable, prodigious, unimaginable, inimaginable, unthinkable, impracticable unachievable, unfeasible, infeasible, insuperable, unsurmountable, insurmountable, unattainable, unobtainable, out of reach, out of the question, not to be had, not to be thought of, beyond control, desperate, incompatible, inaccessible, uncomeatable, impassable, impervious, innavigable, inextricable, self- contradictory, out of one's power, beyond one's power, beyond one's depth, beyond one's reach, beyond one's grasp, too much for, ultra crepidam, the grapes are sour, non possumus, non nostrum tantas componere lites, look for a needle in a haystack, chercher une aiguille dans une botte de foin, il a le mer +a boire.