English

gastight

From gas + tight.

A compound of gas + tight

Ancient Greek χάος ‘chasm’

Dutch gas

English gas

Proto-Indo-European *tenk- ‘to contract’

…

Proto-Germanic *þinhtaz

Proto-West Germanic *þį̄ht(ī)

Old English *þiht

Middle English tight

English tight

Today it means

adj impermeable to gases

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

Etymograph / gastight