Likewise or more fully in other lexica; references at Photius alpha396 Theodoridis. The headword is a two-termination adjective cognate with the verb duswpe/w, "put out of countenance, abash" [see LSJ at web address 1]. Here in the accusative singular if masculine/feminine or the nominative/accusative singular if neuter; either way, evidently quoted from somewhere -- perhaps Marcus Aurelius, Meditations 1.16.9, though there are other possibilities.