ἀγῶν

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 (Corpus Hippocraticum, Aphorisms 1.6.2)

Source

French (Bailly abrégé)

gén. pl. de ἄγος;
gén. pl. de ἀγή.