English

anex

Blend of anion + exchange.

Ancient Greek ἀνιών ‘(thing) going up’

English anion

Proto-Celtic *kambos ‘twisted, crooked’

…

Old French eschangier

Old French eschange ‘exchange’

Anglo-Norman eschaunge

Middle English eschaunge ‘trade’

Today it means

noun Syllabic abbreviation of anion exchange.

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