Meaning

noun someone who gives advice about problems

noun someone who has supervisory duties at a summer camp

noun a lawyer who pleads cases in court

originFrom Middle English counseilour, counseiler, from Anglo-Norman cunseiler, from Old French conseillier, from Latin cōnsiliārius, agent noun from cōnsilior (“to take counsel”), from cōnsilium (“plan, council, wisdom, advice”). Compare councilor. Displaced native Middle English redere, Middle English redesman, and Middle English redyeve, from Old English rǣdġiefa (literally “advice giver”).

Etymology from Wiktionary, CC BY-SA 3.0