disunite

verb (used with object), dis·u·nit·ed, dis·u·nit·ing.

1. to sever the union of; separate; disjoin.
2. to set at variance; alienate: The issue disunited the party members.

verb (used without object), dis·u·nit·ed, dis·u·nit·ing.

3. to part; fall apart.

verb

1. to separate or become separate; disrupt
2. (tr) to set at variance; estrange