The headword, an epic variant of o)kne/w (the first of the glosses), is used in this first person singular in Homer, Iliad 5.255 (web address 1).
[1] The first gloss (which is the usual contracted form of the verb: omicron 112, omicron 113, omicron 116, omicron 117, omega 51) is also in other lexica, e.g. Hesychius omicron479.
[2] Adler notes that Küster conjectured a)naba/llomai "I postpone" instead of a)poba/llomai, and that Boissonade [Jean François Boissonade de Fontarabie, 1774-1857] adduced a scholion on Gregory of Nazianzus (PG 36.903b).