# impermeable

> English word · Adjective · IPA /ɪmˈpɜːmɪəbəl/ · frequency rank #57,451

## Definitions
1. Impossible to permeate.
2. Not allowing passage, especially of liquids; waterproof.

## Etymology
Apparently from im- + permeable. Compare French imperméable, from Latin impermeābilis, from im- + permeābilis (“permeable”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/impermeable