IMPERVIOUS

impervious, imperviable

(adjective) not admitting of passage or capable of being affected; “a material impervious to water”; “someone impervious to argument”

Source: WordNet® 3.1


Etymology

Adjective

impervious (comparative more impervious, superlative most impervious)

Unaffected or unable to be affected by something.

Preventive of any penetration; impenetrable, impermeable, particularly of water.

Immune to damage or effect.

Antonyms

• pervious

Source: Wiktionary


Im*per"vi*ous, a. Etym: [L. impervius; pref. im- not + per through + via way. See Voyage.]

Definition: 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.

Syn.

– Impassable; pathless; impenetrable; imperviable; impermeable.

– Im*per"vi*ous*ly, adv.

– Im*per"vi*ous*ness, n.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Coffee Trivia

The expression “coffee break” was first attested in 1952 in glossy magazine advertisements by the Pan-American Coffee Bureau.

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