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Pronunciation:  im'purveeus

WordNet Dictionary
[adj]  not admitting of passage or capable of being affected; "a material impervious to water"; "steel impervious to bullets"; "someone impervious to argument"

IMPERVIOUS is a 10 letter word that starts with I.


 Synonyms: greaseproof, imperviable, ladder-proof, mothproof, moth-resistant, proof(p), resistant, runproof, run-resistant, soundproof
 Antonyms: pervious
 See Also: impermeable



Webster's 1913 Dictionary
\Im*per"vi*ous\, 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.

      This gulf impassable, impervious.        --Milton.

      The minds of these zealots were absolutely impervious.

Syn: Impassable; pathless; impenetrable; imperviable;
     impermeable. -- {Im*per"vi*ous*ly}, adv. --
     {Im*per"vi*ous*ness}, n.

Thesaurus Terms
 Related Terms: airtight, ballproof, beyond reach, bombproof, bulletproof, burglarproof, callous, calloused, case-hardened, closed forever to, closed to, corrosionproof, dampproof, fireproof, fire-resisting, 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, Philistine, proof, proof against, punctureproof, resistant, rustproof, shatterproof, shellproof, soundproof, steeled against, steely, stony, thick-skinned, tight, unaccessible, unamenable, unapproachable, unattainable, unavailable, un-come-at-able, undiscoverable, ungettable, unimpressionable, uninfluenceable, unmovable, unobtainable, unpassable, unperforable, unpersuadable, unpierceable, unpliable, unprocurable, unreachable, unreceptive, unresponsive, unsecurable, unsuggestible, unsusceptible, unswayable, unyielding, watertight, weatherproof