ἆθλος
διαφέρει δὲ ἡ κωμῳδία τῆς τραγῳδίας, ὅτι ἡ μὲν κωμῳδία ἀπὸ γέλωτος εἰς γέλωτα καταλήγει, ἡ δὲ τραγῳδία ἀπὸ θρήνου εἰς θρῆνον → comedy is different from tragedy, because comedy tapers off from laughter into laughter, but tragedy from lament into lament
English (LSJ)
ὁ, contr. from Ep. and Ion. ἄεθλος, which alone is used by Hom. (except in Od.8.160), and mostly by Hdt. and Pi.:—
A contest either in war or sport, esp. contest for a prize, Hom.; νικᾶν τοιῷδ' ἐπ' ἀέθλῳ (for the arms of Achilles) Od. 11.548; ἄεθλος πρόκειται a task is set one, Hdt.1.126; ἐμοὶ μὲν οὗτος ἄ. ὑποκείσεται Pi.O.1.84; ἄεθλον προτιθέναι to set it, Hdt.7.197; ἆθλοι Πυθικοί, Δελφικοί, S.El.49,682; toil, Pi.P.4.165; of the labours of Heracles, D.S.4.11, etc.: metaph., conflict, struggle, ordeal, Alc.33, A.Pr.702, 752, S.Ant.856. II = ἆθλον 1, Theoc.8.11sqq.—On the proper difference of ἆθλον and ἆθλος v. ἆθλον 11. (For ἄϝεθλος, ἄϝεθλον, as in IG5(2).75.)