Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
trĕpĭdus, a, um, adj. [root in Gr. τρέπω, to turn, put to flight; cf. Lat. torqueo (cf. Fest. p. 367 Müll.); prop. scared; hence], restless, agitated, anxious, solicitous, disturbed, alarmed, in a state of trepidation, etc. (not. freq. in prose till the Aug. per.; perh. not at all in Cic. and Cæs.): tum trepidae inter se coëunt pennisque coruscant (apes), in a hurry, Verg. G. 4, 73; so, Dido, id. A. 4, 642 Serv.: hic galeam tectis trepidus rapit, id. ib. 7, 638; 9, 233: trepidi improviso metu, Sall. J. 97, 5; cf.: curia maesta ac trepida ancipiti metu, Liv. 2, 24, 3: Romae nocturnus terror ita ex somno trepidam repente civitatem excivit, id. 8, 37, 6: trepidi formidine portas Explorant, Verg. A. 9, 169; Just. 2, 13, 9.
( β ) With gen.: illae (apes) intus trepidae rerum per cerea castra Discurrunt, Verg. A. 12, 589: Messenii trepidi rerum suarum, Liv. 36, 31, 5; so, rerum suarum, id. 5, 11, 4: salutis, Sil. 12, 13: admirationis ac metus, Tac. A. 6, 21 fin.: tubarum, Stat. Th. 11, 325.