Ask at the forum if you have an Ancient or Modern Greek query!

εὖ δρᾶν

Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται -> For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
Corpus Hippocraticum, Aphorisms 1.6.2

Greek > English (Woodhouse Phrases Reversed)

εὖ δρᾶν = benefit, do a favor, do a favour, do a good turn, do one a good turn, do service to, treat well, use well

⇢ Look up "εὖ δρᾶν" on Google | LSJ full text search (Translation based on the reversal of Woodhouse's English to Ancient Greek dictionary)