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Definition of impermeable

impermeable

/ɪmˈpɝː.mi.ə.bəl/
im · per · me · a · ble
Adverb:impermeably
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impermeable Lexical Profile

impermeable Game Scores & Validity

• adjective

1

Not allowing fluid, gas, or another substance to pass through.

Example

"A thick layer of impermeable clay prevented the rainwater from seeping into the underground aquifer."

2

Impossible to affect, influence, or penetrate mentally or emotionally.

Example

"The committee remained impermeable to outside political pressure throughout the investigation."

Synonyms
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Antonyms
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• Rhymes for impermeable

• Nearby Words

impermanence
impermanent
impermanently
impermeable
impermeably
impermissible
impersonal

Word Origin & Etymology

Borrowed in the late 17th century from Late Latin impermeabilis, formed from the privative prefix in- ('not') and permeabilis ('passable'), from permeare ('to pass through').

Cite this Entry

Wordmom. (2026). Definition of Impermeable. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/impermeable
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