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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
impermeable is an adjective meaning "preventing especially liquids to pass or diffuse through". It carries one recorded sense.
preventing especially liquids to pass or diffuse through
“impermeable stone”
“an impermeable layer of scum”
“a coat impermeable to rain”
Definitions, synonyms and semantic relations for impermeable come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.