intercede

verb3

1. •
   To plead on someone else's behalf.

   • Our Lady intercedes
2. •
   To act as a mediator in a dispute; to arbitrate or mediate.

   • I to the Lords will intercede, not doubting / Thir favourable ear, — 1671
3. •
   To pass between; to intervene.

   • He supposed that a vast period interceded between that origination and the age wherein he lived. — 1736