intercession

/ˌɪntərˈsɛʃən/
noun
  1. The act of speaking or pleading on behalf of someone else, especially in a prayer or request to a higher authority.
    • Her intercession with the principal helped the student avoid suspension.
    • Many believers see intercession as a way to ask God for help for others.
    • The priest offered a prayer of intercession for the sick members of the community.
  2. The act of intervening or mediating between two parties to resolve a dispute or bring about agreement.
    • Without the intercession of a neutral mediator, the contract negotiations would have failed.
    • The diplomat's intercession prevented the two countries from going to war.
    • The teacher's intercession calmed the argument between the two students.