English

ionise

From ion + -ise.

A compound of ion + -ise

Proto-Indo-European *h₁ey- ‘to go’

Proto-Indo-European *h₁éyti ‘to go, to be going’

Proto-Hellenic *éimi ‘to go’

Ancient Greek εἶμι ‘I go’

Ancient Greek ἰόν ‘going’

English ion

Today it means

verb ionize

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