Meaning

adjective having or revealing supreme mastery or skill

originPIE word *méǵh₂s From Middle English maisterli, from maister (“leader, ruler; high official; official in charge of a place; person in control; employer; owner; schoolmaster, teacher; scholar, sage; holder of a master's degree; religious teacher; master craftsman; expert; magician; social superior; husband; lover; Jesus Christ; a god; male stud animal”) + -li (suffix forming adjectives). Maister…

Etymology from Wiktionary, CC BY-SA 3.0