English -lock

← Old English -lāc (inherited)

← Old English lāc (mention)

← Old English līcian (mention)

← German Leich (cognate)

← English lake (mention)

← English laik (mention)

← Middle English -lok (inherited)

← Middle English -lak (mention)

← Middle English -lac (mention)

← Old French lai (mention)

← Proto-Germanic *laiką (derived)

← Proto-Germanic *laikaz (mention)

← Proto-Indo-European *leyg- (derived)

← Swedish lek (mention)

→ English lake (mention)