Separated into parts; no longer unified or joined together as one.
From dis- (prefix meaning reverse/undo) + unified (past tense of unify, from Latin 'unus' meaning one + -fy meaning to make), literally meaning 'made not one.'
The prefix dis- is one of English's most powerful tools for reversal—almost any word it touches gets flipped upside down, so 'disunified' is the opposite of cooperation, whether nations or puzzle pieces.
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