impermeable
UK /ɪmˈpɜːmɪəbəl/ · US /ɪmˈpɝmɪəbəl/ adjective
- adjective Impossible to permeate.
- adjective Not allowing passage, especially of liquids; waterproof.
Synonyms
Antonyms
Etymology
Apparently from im- + permeable. Compare French imperméable, from Latin impermeābilis, from im- + permeābilis (“permeable”).
Webster’s 1913
- adjective Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air. -- Im*per"me*a*ble*ness, n. -- Im*per"me*a*bly, adv.
Etymology [Pref. im- not + permeable: cf. F. imperméable, L. impermeabilis.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “impermeable”, CC BY-SA 4.0. Details