verb
intercede
in-ter-SEED/ˌɪntərˈsiːd/
To intervene on behalf of a person or cause.
The older man intercedes for the employee before the angry café manager.

Etymology
The pieces convey “going between.” Coming between people became acting as a mediator, then intervening or pleading on another person's behalf.
In context
gof asked Gilmore who turned down the offer and then asked Mason to intercede on his behalf
More examples
- Could you intercede for me and ask the landlord for more time?
- The union interceded on behalf of the dismissed workers.
- He is interceding with city officials to save the community garden.
Forms
intercede · intercedes · interceded · interceding
intercession noun — The act of intervening on another's behalf.