effective
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → But for extreme illnesses, extreme remedies, applied with severe exactitude, are the best (Hippocrates, Aphorism 6)
English > Greek (Woodhouse)
adj.
Hitting the mark: P. επιτυχής. Accomplish its object: P. and V. δραστήριος, V. πρακτήριος. Fit for action: P. ἐνεργός, δυνατός. Authoritative: P. and V. κύριος.