From a merger of at least two Proto-Indo-European suffixes:
- *-eyé-, a compound suffix of the morphemes below. Cognates include most Latin -īre (fourth conjugation) verbs, some -ēre (second conjugation) verbs, some Germanic *-janą verbs, Sanskrit denominative verbs in [script needed] (-áyati)[Devanagari needed].
- *-éye- (causative suffix). Cognates include Latin causatives in -ēre (second conjugation), some Germanic causative *-janą verbs, Sanskrit causative verbs in [script needed] (-áyati)[Devanagari needed].
There may be others.
- (5th BC Attic): IPA: /eɔ͜ɔ/
- (1st BC Egyptian): IPA: /ɛoː/
- (4th AD Koine): IPA: /eo/
- (10th AD Byzantine): IPA: /eo/
- (15th AD Constantinopolitan): IPA: /eo/
-έω • (-éō)
- Used to form verbs from nouns, adjectives and other verbs.