Proto-Germanic *luką

→ English lock (inherited)

→ English locker (inherited)

→ Old English loc (inherited)

→ Cimbrian loch (inherited)

→ Cimbrian lòch (inherited)

→ Danish låg (inherited)

→ German Loch (inherited)

→ Finnish lukko (mention)

→ Old French loc (derived)

→ Westrobothnian lakk (inherited)

→ Old High German loh (inherited)

→ Ancient Greek λύγος (cognate)

→ Luxembourgish Lach (inherited)

→ German Low German Lock (inherited)

→ Old Norse Loki (inherited)

→ Polish loch (derived)