Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unclimbable is an adjective meaning "incapable of being ascended". It carries 2 recorded senses.
incapable of being ascended
incapable of being surmounted or climbed
Definitions, synonyms and semantic relations for unclimbable come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.