disunite

verb

1. (transitive)To cause disagreement or alienation among or within.

   “If they cannot disunite them by domestic broils, then they engage their neighbours against them.”

   “Secrets disunite a family.”

2. (transitive)To separate, sever, or split.

   “I have discovered how to disunite that force and that particle.”

3. (intransitive)To disintegrate; to come apart.

   “You cannot bind me more to you, my lord. Farewell till we renew... I trust, renew A converse ne'er to disunite again.”