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