Lewis & Short

prae-trĕpĭdus, a, um, adj., trembling very much (post-Aug.).

  1. I. Lit.: cor, palpitating, throbbing, Pers. 2, 52.
  2. II. Transf., trembling greatly, very anxious, disquieted: praetrepidus vixit, Suet. Tib. 63: Romam praetrepidus rediit, id. Ner. 41.