advocate
noun
Pronunciation: /ˈadvəkət/
- 1a person who publicly supports or recommends a particular cause or policy: he was an untiring advocate of economic reform
- 2a person who puts a case on someone else’s behalf: care managers can become advocates for their clients
- a professional pleader in a court of justice: solicitors may act as advocates in Crown Courts
- Scottish and South African term for barrister
verb
Pronunciation: /ˈadvəkeɪt/

Origin:
Middle English: from Old French avocat, from Latin advocatus, past participle (used as a noun) of advocare 'call (to one's aid)', from ad- 'to' + vocare 'to call'