Likewise, accordng to Adler, in the Ambrosian Lexicon; and cf. the scholia to Homer, Iliad 6.298, where the headword occurs (without nu ephelkystikon: web address 1).
The headword is third person singular, aorist indicative active, of the verb oi)/gnumi or oi)/gw, glossed with the aorist of the more common compound verb a)noi/gnumi. In epic, the augmented form is usually w)i+- (with diaeresis), although the contracted form is attested at Homer, Iliad 24.457. LSJ entry at web address 2. Other forms of this verb appear at omicroniota 21, omega 11, and omega 38.