ἐχιδνοειδής
From LSJ
εἰς τετρημένον πίθον ἀντλεῖν → run water into a punctured pitcher, to the perforated jar bale water, labour in vain, labor in vain
English (LSJ)
ές,
A snake-like, Gloss.
German (Pape)
[Seite 1126] ές, zsgzgn ἐχιδνώδης, natterartig, Schol. Eur. Phoen. 1136.