Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
undependable is an adjective meaning "not worthy of reliance or trust". It carries 2 recorded senses.
not worthy of reliance or trust
“in the early 1950s computers were large and expensive and unreliable”
“an undependable assistant”
liable to be erroneous or misleading
“an undependable generalization”
Definitions, synonyms and semantic relations for undependable come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.