ἀνηνύτως
From LSJ
αὔριον ὔμμε πάσας ἐγὼ λουσῶ Συβαρίτιδος ἔνδοθι λίμνας → tomorrow I'll wash you one and all in Sybaris lake
Greek > English (Woodhouse Verbs Reversed)
(see also: ἀνήνυτος) without accomplishing anything
Russian (Dvoretsky)
ἀνηνύτως: бесполезно, бесцельно: ἀ. ἔχειν Soph. быть бесполезным.