ὀξύς akin to ὠκύς sharp, keen, Hom., Hes., etc.; ἐς ὀξὺ ἀπηγμένος brought to a point, Hdt.; τὸ ὀξύ the vertex of a triangle, Hdt. of feeling, sharp, keen, ὀδύναι Il.; ὀξὺς ἠέλιος the piercing sun, Hhymn.; so, χιὼν ὀξεῖα, like Hor.ʼs gelu acutum, Pind.; μάχη ὀξέα keenly contested, Hdt. of the sight, neut. as adv., ὀξύτατον δέρκεσθαι to be keenest of sight, Il.; so ὀξὺ νοεῖν to notice a thing sharply, Il.; ὀξὺ ἀκούειν to be quick of hearing, Il. of things that affect the sight, dazzling, bright, of the sun, Il.; of colours, Ar. of sound, sharp, shrill, piercing, Il.; and of the voice, ὀξὺ βοήσας, ὀξὺ λεληκώς Il., etc. of musical tones, sharp, high, opp. to βαρύς, Plat. of taste, sharp, pungent, acid, Xen., etc. of smell, ὀξύτατον ὄζειν Ar. metaph. of mind, sharp, keen: quick to anger, hasty, passionate, Il., Soph., etc. sharp, quick, clever, Plat.; c. inf., ὀξ. ἐπινοῆσαι Thuc.; γνῶναι ὀξύτατοι Dem. of motion, quick, swift, Ar.; ἡ νόσος ὀξεῖα φοιτᾷ καὶ ταχεῖʼ ἀπέρχεται Soph.; ὀξὺς νότος Soph. regul. adv. ὀξέως, quickly, soon, Thuc., Plat.; but, neut. ὀξύ and pl. ὀξέα as adv., v. supr.:—comp. ὀξύτερον Thuc., etc.; Sup. ὀξύτατον Il.; ὀξύτατα Plat.