ὑπν-ώσσω · hypn-ōssō — LSJ
to be sleepy or drowsy, ἄγαν ὑπνώσσεις A. Eu. 121, cf. 124, Hp. Epid. 7.11 (v. ὑπνόω II), Pl. R. 534c, Arist. PA 653a14, Gal. 4.436, 439: simply, sleep, E. Or. 173 (lyr.), Cyc. 454 (where Herm. ὑπνώσσῃ for -ώσῃ): metaph., φόβῳ δʼ οὐχ ὑπνώσσει κέαρ my heart knows not sleep, A. Th. 288 (lyr.).