English
halogenate
From halogen + -ate (verb-forming suffix).
Proto-Indo-European *sḗh₂l ‘salt’
Proto-Hellenic *hā́ls ‘salt’
Ancient Greek ἅλς ‘salt" or "sea’
English halogen
Today it means
verb To treat with, or react with, a halogen or a hydrohalic acid.
Language periods are conventional ranges, not dates for this word.
Etymograph / halogenate