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impermeable
adjective
See more 4-syllable adjectives

Divide impermeable into syllables:

im · per · me · able

How to pronounce impermeable:

Definition of impermeable:

impermeable (adjective):
impervious
(of a substance) not allowing fluid to pass through
not permitting passage (as of a fluid) through its substance
adjective. preventing especially liquids to pass or diffuse through.

Synonyms for impermeable:

waterproofdensecompactimpregnableimpassableclosetightthicksturdysolid
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Other 4-syllable words like impermeable

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