A.cry, shout, both of victor and vanquished, Il.15.396, etc.; wail, shriek, Od.11.43; also, a joyous sound, “ἰαχὰ ὑμεναίων” Pi.P.3.17, cf. E.Tr.337 (lyr., pl.); “κροτάλων τυπάνων τε” h.Hom.14.3; “αὐλῶν” Lyr.Adesp.96; “συρίγγων” E.IA 1039 (lyr.): in pl., generally, shouts of joy, Thgn.779, E.Ba.149 (lyr.); but πολύδακρυς ἰ. A.Pers.940, cf. E.El.142, Ph.1302 (all lyr.). (ϝι-, cf. Il.4.456: a vowel is not elided before it in Ep. exc. in h.Hom. 14.3, Hes.Th.708, Sc.404: Trag. only in lyr.; for the quantity cf. foreg.)
ἰα^χ-ή , ἡ,