FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

oninemi ὀνίναμαι — on-in'-ay-mee — a prolonged form of an apparently primary verb (onomai, to slur); for which another prolonged form (onao) is used as an alternate in some tenses (unless indeed it be identical with the base of 3686 through the idea of notoriety); to gratify, i.e. (middle voice) to derive pleasure or advantage from:--have joy.

see GREEK for 3686