act on behalf
- representStand in for
- proxyAuthorized substitute
- delegateEntrust authority to another
- stand inTemporary substitute person
- advocatePublic cause supporter
agent · ambassador · attorney · spokesperson · negotiate · authority · power of attorney · surrogate · substitute · emissary · intermediary · broker · liaison · trustee · guardian · executor · steward · champion
agency and representation
act on behalfbetray
Violate a trust
undermine · sabotage · go it alone · double-cross · sell out