ὑπόκεν-ος · hypoken-os — LSJ
somewhat hollow, Ruf. Onom. 139, v.l. in Dsc. 2.131; simply, hollow, πλάσον Ἑρμῆν ὑπόκενον PMag.Par. 1.2361; somewhat flabby, Mnesith. ap. Orib. inc. 15.8: metaph., ᾠδή Hsch. s.v. ἴθυμβος (-κυνος cod.); ὑ. καὶ ψυχρόν Hermog. Id. 2.9; δόξα Hierocl. in CA 23p.470M.