ἰεῦ
From LSJ
μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
English (LSJ)
an ironical exclamation,
A whew! Ar.V.1335.
German (Pape)
[Seite 1244] Interjection des Spottes, hui, Ar. Vesp. 1335.
Greek (Liddell-Scott)
ἰεῦ: χλευαστικὸν ἐπιφώνημα, Λατ. hui!, Ἀριστοφ. Σφ. 1335,