English
antichemical
From anti- + chemical.
Proto-Indo-European *h₂ent- ‘forehead’
Proto-Indo-European *h₂énts ‘forehead’
Proto-Indo-European *h₂énti ‘opposite’
Ancient Greek ᾰ̓ντῐ́ ‘over against, opposite’
English anti-
Today it means
adj Countering the effects of chemical warfare.
Language periods are conventional ranges, not dates for this word.
Etymograph / antichemical