The headword, a consonant declension adjective, is both masculine and feminine (with neuter eu)mare/s); cf. epsilon 3573, epsilon 3574, epsilon 3575, epsilon 3576, and see generally LSJ s.v. The headword appears at Sophocles, Electra 179 (web address 1); cf. the scholia there.
[1] = Synagoge epsilon960; Photius, Lexicon epsilon2244; cf. Etymologicum Genuinum s.v. (whence Etymologicum Magnum 393.10). Compare also Hesychius epsilon6978; and epsilon 3543, epsilon 3574 gloss, epsilon 3576 and epsilon 3822.
[2] Similar to the headword, but of foreign origin: 'an Asiatic shoe or slipper' (LSJ s.v. and already at epsilon 3574 end); in late Greek the word would have been homophonous with the headword, apart from accent.