Lewis & Short

trĕmo, ŭi, 3, v. n. and a. [cf. Gr. τρέμω, to tremble; ἀτρέμας, quiet].

  1. I. Neutr., to shake, quake, quiver, tremble, etc. (freq. and class.; cf. trepido): sapiens si algebis, tremes, Novat. ap. Cic. de Or.2, 70, 285 (Com.Rel. v. 116 Rib.): pro monstro extemplo’st, quando qui sudat tremit, Plaut. As. 2, 2, 23: viden’, ut tremit atque extimuit, id. Mil. 4, 6, 57: totus Tremo horreoque, Ter Eun. 1, 2, 4: si qui tremerent et exalbescerent objecta terribili re extrinsecus, Cic. Ac. 2, 15, 48: timidus ac tremens, id. Pis. 30, 74: tremo animo, id. Q. Fr. 1, 1, 1, § 4; so, animo, Sen. Agam. 833: toto pectore tremens, Cic. Tusc. 4, 22, 49: corde et genibus tremit, Hor. C. 1, 23, 8.
    In a Greek construction: tremis ossa pavore, Hor. S. 2, 7, 57: ingemit et tremit artus, Lucr. 3, 489; cf. Verg. G. 3, 84.
    1. B. Of things: mare caelum terram ruere ac tremere diceres, Afran. ap. Prob. ap. Verg. E. 6, 31 (Com. Rel. v. 9 Rib.): membra miserae tremunt, Plaut. Cas. 3, 5, 2: genua, Sen. Ep. 11, 2: artus, Verg, A. 3, 627: manus, Ov. M. 8, 211: umeri, Verg. A. 2, 509: haec trementi questus ore, Hor. Epod. 5, 11; so, ore tremente, Ov. Tr. 3, 11, 54 et saep.: Africa terribili tremit horrida terra tumultu, Enn. ap. Fest p. 153 Müll. (Ann. v. 311 Vahl.): verbere ripae, Hor. C. 3, 27, 23: aequor, Ov. M. 4, 136: ilices, Hor. Epod. 10, 8: hasta per armos Acta, Verg. A. 11, 645: vela, Lucr. 4, 77: frusta (carnis), i.e. to quiver, Verg. A. 1, 212: seges altis flava spicis, Sen. Oedip 50; id. Med. 46.
  2. II. Act., to quake or tremble at a thing (mostly poet. and perhaps not ante-Aug.): virgas ac secures dictatoris tremere atque horrere, Liv, 22, 27, 3: Junonem Offensam, Ov. M. 2, 519: neque iratos Regum apices neque militum arma, Hor. C. 3, 21, 19: jussa virum nutusque, Sil. 2, 53: te Stygii tremuere lacus, Verg. A. 8, 296: non praesidum gladios tremunt, Lact. 5, 13, 17: varios casus, Sen. Troad. 262: hostem, id. ib. 317.
    Hence, trĕmendus, a, um, P a. (acc. to II.), that is to be trembled at; hence, fearful, dreadful, frightful, formidable, terrible, tremendous (poet. and in post-Aug. prose): manes adiit regemque tremendum, Verg. G. 4, 469: Chimaera, Hor. C. 4, 2, 15: vates visu audituque, Stat. Th. 10, 164: oculi, Ov. M. 3, 577: cuspis, Hor. C. 4, 6, 7: tumultus, id. ib. 1, 16, 11: Alpes, id. ib. 4, 14, 12: monita Carmentis, Verg. A. 8, 335: nefas, Val. Fl. 2, 209: tigris animal velocitatis tremendae, Plin. 8, 18, 25, § 66.