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