Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
utterable is an adjective meaning "capable of being uttered in words or sentences". It carries one recorded sense.
capable of being uttered in words or sentences
Definitions, synonyms and semantic relations for utterable come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.