disunite

verb3

1. •
   To cause disagreement or alienation among or within.

   • If they cannot disunite them by domestic broils, then they engage their neighbours against them. — 1516
2. •
   To separate, sever, or split.

   • I have discovered how to disunite that force and that particle. — 1899
3. •
   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. — 1843