Find Synonyms

impermeable Synonyms

Another word for impermeable

Choosing another word for impermeable depends on context, so the 11 synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

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

Usage Example

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

Strongest
impervious
nonporous
impenetrable
Strong
waterproof
watertight
airtight
hermetic

• adjective (Context 2)

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

Usage Example

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

Strongest
impervious
impenetrable
Strong
resistant
immune
unreceptive
unyielding

Opposites of impermeable

The opposite of impermeable shifts depending on context. Common opposites include:

permeable
pervious
susceptible
porous
receptive
vulnerable
absorbent
open
See all opposites of impermeable

• Nearby Words

impermanence
impermanent
impermanently
impermeable
impermeably
impermissible
impersonal

Cite this Entry

Wordmom. (2026). Synonyms for Impermeable. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/impermeable
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