Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
trĕpĭdo, āvi, ātum, 1, v. n. and a. [id.], to hurry with alarm, to bustle about anxiously, be in a state of confusion, agitation, or trepidation (class., but not in Cic.): ut ille trepidabat! ut festinabat miser! Plaut. Cas. 2, 7, 9; so with festinare, Ter. Ad. 3, 2, 25; Sall. C. 31, 1: quid est quod trepidas, Ter Eun. 5, 5, 8: tum demum Titurius trepidare, concursare, Caes. B. G. 5, 33: trepidare omnibus locis, Sall. J. 38, 5: currere per totum pavidi conclave magisque Exanimes trepidare, Hor. S. 2, 6, 114: dum in sua quisque ministeria discursu trepidat ad prima signa, Liv. 23, 16, 12: trepidante totā civitate ad excipiendum Poenum visendumque, id. 23, 7, 10: circa vallum (hostes), Auct. B. Afr. 82, 1: circum artos cavos (mures), Phaedr. 4, 6, 3: vigiles tumultuari, trepidare, moliri portam, Liv. 27, 28, 10: nobis trepidandum in acie instruendā erat, id. 44, 38, 11: dum trepidant alae, Verg. A. 4, 121: lymphati trepidare coeperunt, Curt. 4, 12, 14: at Romanus homo … Corde suo trepidat, Enn. Ann. 4, 7; Plaut. Ep. 1, 1, 59: spe trepido, Luc. 7, 297: trepidare laetitiā, Arn. 7, n. 4: voce, Pers. 1, 20: multa manu medicā Phoebique potentibus herbis Nequiquam trepidat, Verg. A. 12, 403: nam veluti pueri trepidant atque omnia caecis In tenebris metuunt, Lucr. 2, 55; 3, 87; 6, 35; cf.: ancipiti trepidant terrore per urbes, id. 6, 596: recenti mens trepidat metu, Hor. C. 2, 19, 5: metu falso, Ov. Tr 1, 5, 37: formidine belli, id. ib. 3, 10, 67: in dubiis periclis, Lucr. 3, 1076: ridetque (deus), si mortalis ultra Fas trepidat, Hor. C. 3, 29, 32.
Impers. pass.: trepidari sentio et cursari rursum prorsum, Ter. Hec. 3, 1, 35: totis trepidatur castris, Caes. B. G. 6, 37: ubi jam trepidatur, Lucr. 3, 598: vastis trepidatur in arvis, Sil. 4, 26: si gradibus trepidatur ab imis, Juv. 3, 200.