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# The Good Oil Word of the Day
- URL: https://goodoil.news/the-good-oil-word-of-the-day-310/
- Published: 2025-06-13T18:15:24.000Z
- Updated: 2025-06-13T18:15:23.000Z
- Author: David Theobald
- Tags: General, Word of the Day

The word for today is…

impervious (adjective):

1a: not allowing entrance or passage : impenetrable  
b: not capable of being damaged or harmed  
2: not capable of being affected or disturbed

Source : [Merriam -Webster](https://www.merriam-webster.com/dictionary/impervious?ref=goodoil.news)

Etymology : The Latin ancestor of impervious is impervius, which adds the prefix im-, meaning “not,” to pervius, meaning “passable or penetrable.” Pervius in turn comes from per, meaning “through,” and via, meaning “way.” Impervious, it follows, describes things that don’t allow a way through something, whether literally (as in “asphalt, concrete, and other surfaces that are impervious to rain”) or figuratively (as in “impervious to criticism/pressure”). The opposite of impervious, pervious, entered English at around the same time, but it is much less common.

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