Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

pernīcĭter, adv., v. pernix fin.

pernix, īcis (abl. pernici, Lucr. 5, 559: pernice, id. 2, 635), adj. [per-nitor, qs. striving or pressing through], nimble, brisk, active, agile, quick, swift, fleet (cf.: levis, praepes, celer, promptus): pernix sum manibus, Plaut. Mil. 3, 1, 36: corporum pernicium, Liv. 28, 20; Verg. A. 11, 718: viginti milibus juvenum velocitate pernicibus, Vell. 2, 34, 1: conjugis adventu pernix Saturnus, Verg. G. 3, 93: pernicis uxor Appuli, Hor. Epod. 2, 41: genus, Tac. H. 2, 13: nuntii, id. ib. 3, 40: pedibus celerem et pernicibus alis, Verg. A. 4, 180: temporis pernicissimi celeritas, Sen. Ep. 108, 27: saltus, Plin. 9, 47, 71, § 154.

        1. (β) With inf.: amata relinquere pernix, Hor. A. P. 165.
          Hence, adv.: pernīcĭter, nimbly, quickly, swiftly, Plaut. Am. 5, 1, 63: equo desilire, Liv. 26, 4: exilire, Cat. 61, 8: alites alte perniciterque volantes, Plin. 8, 14, 14, § 36.