belock

The story

1. Proto-West Germanic · inherited from*bilūkan“to lock up”
2. Old English · inherited frombelūcan“to lock up, bring to an end”
3. Middle English · inherited frombelouken
4. English todaybelock

From Middle English belouken, bilouken, from Old English belūcan (“to lock up, bring to an end”), from Proto-West Germanic *bilūkan (“to lock up”), equivalent to be- + lock. Cognate with Middle Low German belûken (“to close, secure”), Middle High German belūchen, belouchen (“to enclose, shut in”), obsolete German belochen (“lock up, lock in, include”).