δουλεύειν
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
Greek > English (Woodhouse Verbs Reversed)
(see also δουλεύω): be a slave to, be a slave