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