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impervious

adjective

im·​per·​vi·​ous (ˌ)im-ˈpər-vē-əs How to pronounce impervious (audio)
1
a
: not allowing entrance or passage : impenetrable
a coat impervious to rain
b
: not capable of being damaged or harmed
a carpet impervious to rough treatment
2
: not capable of being affected or disturbed
impervious to criticism
imperviously adverb
imperviousness noun

Did you know?

The English language is far from impervious, and, of course, a great many Latinate terms have entered it throughout its history. Impervious is one of the many that broke through in the 17th century. It comes from the Latin impervius, which adds the prefix im- to pervius, meaning "passable" or "penetrable." Pervius—which is also the source of the relatively uncommon English word pervious, meaning "accessible" or "permeable"—comes from per-, meaning "through," and via, meaning "way."

Example Sentences

He looked at her, impervious to her tears … Jean Stafford, Children Are Bored on Sunday, (1945) 1953 … the trunk … is encased in so hard a bark, as to be almost impervious to a bullet … Herman Melville, Omoo, 1847 … Berlin struck me, above all, as impervious to any political reactions whatever … Stephen Spender, New York Times Magazine, 30 Oct.1977 the material for this coat is supposed to be impervious to rain the rain forest is impervious to all but the most dedicated explorers
Recent Examples on the Web Other factors, like abundant pavement and other impervious surfaces, can also exacerbate flash floods, especially in urban areas. Dharna Noor, BostonGlobe.com, 25 Aug. 2022 The Robinson Forest, an old and established forest with no impervious surfaces, still could not handle the streams with multiple watersheds flowing onto the land as a result of the downpour of precipitation, Barton said. Melissa Griffin, ABC News, 3 Aug. 2022 As with all things that go up like a rocket, crypto wasn’t impervious to an IRL crash. Cynthia Littleton, Variety, 18 Aug. 2022 And Covid-19 vaccines, despite their ability to drastically reduce hospitalization and death, are not impervious to the threat of antigenic variation of SARS-CoV-2 spike. William A. Haseltine, Forbes, 17 Aug. 2022 Such locations are supposed to be impervious to eavesdropping and no electronic devices are allowed. Pierre Thomas, ABC News, 15 Aug. 2022 But that doesn’t mean that your mail is impervious to law enforcement scrutiny. Aziza Ahmed, CNN, 3 Aug. 2022 Starbucks has proven itself something of an anomaly in its impervious resistance to economic conditions. Jj Kinahan, Forbes, 3 Aug. 2022 The French leader, who once compared the country’s presidency to the king of the Roman gods, spent much of his first term impervious to political opposition, issuing directives and inviting limited debate. Noemie Bisserbe, WSJ, 30 July 2022 See More

Word History

Etymology

Latin impervius, from in- + pervius pervious

First Known Use

1615, in the meaning defined at sense 1a

Time Traveler
The first known use of impervious was in 1615

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