gardien

guard (someone who keeps guard of something); guardian, warden (protector); guardian (someone who looks after something else); guardian; ellipsis of gardien de but (goalkeeper; goaltender; goalie)

From Old French guardian, guardein (“protector, guard”), from an earlier *gardenc, the first root deriving from guarder and the second from Proto-Germanic *-ingaz, cf the similarly-formed Italian guardingo . The suffix was later changed; compare the Learned borrowing from Medieval Latin guardianus, which may have influenced it. Doublet of gardian.