Same entry in other lexica, and cf. Hesychius epsilon859 (s.v. ei(/lato [sic]). The headword is aorist middle, third person singular, of ai(re/w. It must be quoted from somewhere -- and, commonplace though it is, Theodoridis on Photius s.v. confidently identifies the source as Gregory of Nazianzus, Orations 21.36 (PG 35.1125c).
cf. generally alphaiota 302, epsilon 801, epsilon 895, epsiloniota 130.