Agon, agônos, pen. prod. m. g. All contention in forme of hattayle: iusting: wrastling: also the place.
Lewis and Short: Latin dictionary
ăgōn, ōnis, m., = a)gw/n, gen.w=nosa contest or combat in the public games: gymnicus, Plin. Ep. 4, 22: non esse restituendum Viennensibus agona, id. ib. 4, 22fin.: musicus, Suet. Ner. 22; so id. ib. 23.—Hence, prov.: nunc demum agon est = nu=n ga/r e)stin a)gw/n, now we must act, now is the time for action, Suet. Ner. 45.