Impervious

a.

1.

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. - Macaulay.

Adj.

1.

impervious - not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument" Synonyms: imperviable Antonyms: pervious - admitting of passage or entrance; "pervious soil"; "a metal pervious to heat"

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

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