Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
festīnus, a, um (ante-class. form of the acc. sing. festinem in the verse: nunc haec res me facit festinem, Titin. ap. Non. 482, 33; cf. Comic. Lat. ed. Rib. p. 127), adj. [festino], hasty, hastening, in haste, quick, speedy (poet.; syn.: celer, rapidus, velox, etc.): cursu festinus anhelo, Ov. M. 11, 347: veste tegens, tibi quam noctes festina diesque Urgebam, Verg. A. 9, 488: taedia vitae, early, Val. Fl. 6, 325; cf.: cruda festinaque virtus, Stat. Th. 9, 716: celeritas, Cod. Th. 16, 5, 53 al. (but in Enn. ap. Char. p. 251 P. the right read. is Vestina, v. Vahl. Enn. Ann. v. 280).