impervious

[ im-pur-vee-uhs ]
/ ɪmˈpɜr vi əs /
SEE SYNONYMS FOR impervious ON THESAURUS.COM

adjective

not permitting penetration or passage; impenetrable: The coat is impervious to rain.
incapable of being injured or impaired: impervious to wear and tear.
incapable of being influenced, persuaded, or affected: impervious to reason; impervious to another's suffering.
Also im·per·vi·a·ble [im-pur-vee-uh-buhl] /ɪmˈpɜr vi ə bəl/.

Origin of impervious

From the Latin word impervius, dating back to 1640–50. See im-2, pervious

OTHER WORDS FROM impervious

im·per·vi·ous·ly, adverb im·per·vi·ous·ness, noun

WORDS THAT MAY BE CONFUSED WITH impervious

impermeable impervious

Words nearby impervious

impertinence, impertinency, impertinent, imperturbable, imperturbation, impervious, impetiginous, impetigo, impetigo herpetiformis, impetigo neonatorum, impetigo vulgaris

Words related to imperviousness

intransigence, friction, counteraction, obstruction, battle, check, shield, support, fight, holding, immunity, contention, combat, screen, refusal, watch, detention, protection, struggle, defiance

British Dictionary definitions for imperviousness

impervious

imperviable

/ (ɪmˈpɜːvɪəs) /

adjective

not able to be penetrated, as by water, light, etc; impermeable
(often postpositive foll by to) not able to be influenced (by) or not receptive (to) impervious to argument

Derived forms of impervious

imperviously, adverb imperviousness, noun