Used adjectivally as the past participle of the verb "disunite".
Definitions
Separated or made lacking in unity; divided. After the civil war, the once prosperous nation was disunited and weakened.
The past-participle form "disunited" is regularly used attributively (e.g., "a disunited country").
Definitions
Lacking unity; divided or fragmented. The disunited alliance quickly collapsed under external pressure.