āśú mfn. (√ 1. aś, [Uṇ. i, 1]), fast, quick, going quickly, [RV.]; [AV.]; [ŚBr.] &c.
(us), m. Ved. the quick one, a horse, [RV.]; [AV.]
āśú (us or u), m n. rice ripening quickly in the rainy season, [ŚBr.]; [KātyŚr.]; [L.]
āśú (u), n. N. of a Sāman
āśú (u), ind. quickly, quick, immediately, directly, [Suśr.]; [Megh.]; [Pañcat.] &c.
[cf. Gk. ὠκύς, ὤκιστος; Lat. acu in acupedius, ôcissimus: of the same origin may be the Lat. aquila and accipiter.]