English

relock

From re- + lock.

Formed from re- + lock

Proto-Italic *wre- ‘again’

English re-

Proto-Indo-European *lewg- ‘to bend’

Proto-Germanic *luką

Proto-West Germanic *lok ‘shutter’

Old English loc

Middle English lok

English lock

Today it means

verb To lock again.

Language periods are conventional ranges, not dates for this word.