Lewis & Short

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.

        1. (β) Like tremo with acc., to tremble at, be afraid of (poet. and very rare): et motae ad lunam trepidabis harundinis umbram, Juv. 10, 21: occursum amici, id. 8, 152: lupos (damae), Sen. Herc. Oet. 1058.
        2. (γ) With inf. (poet.): ne trepidate meas, Teucri, defendere naves, Verg. A. 9, 114: occurrere morti, Stat. Th. 1, 639.
        3. (δ) With ne: trepidat, ne Suppositus venias et falso nomine poscas, Juv. 1, 97; 14, 64.
      1. b. Of things, Lucr. 2, 965: quae (aqua) per pronum trepidat cum murmure rivum, Hor. Ep. 1, 10, 21; cf.: obliquo laborat Lympha fugax trepidare rivo, id. C. 2, 3, 12: flammae trepidant, flare, waver, flicker, id. ib. 4, 11, 11: trepidantia exta, throbbing, quivering, palpitating, Ov. M. 15, 576: sic aquilam pennā fugiunt trepidante columbae, id. ib. 1, 506: sub dentibus artus, id. ib. 14, 196.
      2. c. With inf.: octavum trepidavit aetas Claudere lustrum, Hor. C. 2, 4, 24.
        Hence, trĕpĭdanter, adv., trem blingly, timorously, anxiously, with trepidation (rare): trepidanter effatus, Suet. Ner. 49.
        Comp.: trepidantius timidiusque agere, Caes. B. C. 1, 19.