English

gaslock

From gas + lock.

A compound of gas + lock

Ancient Greek χάος ‘chasm’

Dutch gas

English gas

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

noun A gastight chamber.

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