ὄμβρ-ιος · ombr-ios — LSJ
rainy, of rain, ὄ. ὕδωρ rain-water, Xenoph. 30.4, SIG 56.29 (Argos, V B.C.), Hdt. 2.25, Hp. Aër. 7, etc. ; ὕδατα Pi. O. 10(11).3 ; χάλαζα S. OC 1502 ; νέφος Ar. Nu. 288 ; Ζεὺς ὄ., as sender of rain, Lyc. 160, cf. Str. 15.1.69, Plu. Symp. 2.158e.