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