köken: Learned borrowing from Ancient Greek ἐπάγγελμα (epángelma) (Hellenistic sense "profession", ancient "promise"), and semantic loan from French profession. By surface analysis, επ- (ep-, “upon”) + αγγέλλω (angéllo, “Ι announce”) + -μα (-ma, “-ing”). Calque of Latin professiō (“avowal, public declaration”).
profession (practitioners of an occupation collectively, especially of one requiring great knowledge and skill) · guild (tradespeople collectively, or their association)