IPA: /ˌʌn.juˈnaɪ.tɪd/
KK: /ʌnjuːˈnaɪtɪd/
Not joined together or not in agreement; separated or divided.
The country was ununited, with different regions having conflicting interests.
Ununited → It is formed from "un-" (meaning not) and "united" (from Latin "unire", meaning to unite). The word "ununited" means not united or not joined together.
Think of 'not' ('un-') and 'joined together' ('united') to remember that 'ununited' means something that is not joined.