impervious
UK: ɪmˈpɜːviəs | US: ɪmˈpɜːrviəs
adj. not allowing fluid to pass through
adj. unable to be affected by external influences
impervious = im<not> + per<through> + vious<relating to>
- im (Latin prefix "in-" meaning "not")
- per (Latin root "per" meaning "through")
- vious (derived from Latin "via," meaning "way" or "relating to passage")
Etymology Origin:
The word "impervious" originates from Latin impervius, combining im- (negation) + pervius ("passable," from per "through" + via "way"). It originally described physical barriers (e.g., waterproof materials) and later expanded metaphorically to describe emotional or intellectual resistance. The morphemes reflect a logical progression: "not" + "through" + "way" → "no passage allowed."
The coat is made of impervious material, keeping the rain out completely.
She remained impervious to criticism, focusing on her goals.
The fortress walls were impervious to enemy attacks.
His arrogance made him impervious to advice.
This type of glass is impervious to ultraviolet rays.