ὑπεύδιος · hypeudios — LSJ
under the calm sky, γέρανοι Arat. 1012; τὰ ὑπεύδια καὶ κατασκιαζόμενα τῶν δένδρων sheltered . . trees, Plu. ap. EM 103.53 = Sch. Il. 15.625.
somewhat calm, ἀκτή A.R. 1.584, cf. 3.1202; ὑ. καὶ λεία θάλαττα Ael. NA 1.41, etc.; τὸ ὑ. τῆς θαλάσσης a tolerable calm, Plu. Them. 32. [ῑ in Arat. l.c. metri gr., cf. εὔδιος.]