Likewise or similarly in other lexica: references at Photius nu106 Theodoridis. The headword is a verbal adjective from nemesa/w (cf. nu 153, nu 154, nu 155, nu 156, nu 164), here in the masculine accusative singular or neuter nominative/accusative singular. Either way, it must be quoted from somewhere, and Latte on Hesychius nu181 suggests Homer, Iliad 3.410 (nemesshto/n there).