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