Early 15th century, from Latin intercessionem, from intercēdō, from inter- (“between”) + cēdō (“I go”) (English cede), literally “go-between”.
Wikipedia intercession (plural intercessions)
- The act of intervening or mediating between two parties
- A prayer to God on behalf of another person
a prayer to God on behalf of another person
- ^ “intercession” in Douglas Harper, Online Etymology Dictionary (2001).