Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
disunited is an adjective meaning "having been divided; having the unity destroyed". It carries one recorded sense.
having been divided; having the unity destroyed
“Congress...gave the impression of...a confusing sum of disconnected local forces”
“a league of disunited nations”
“a fragmented coalition”
“a split group”
Definitions, synonyms and semantic relations for disunited come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.