[syn: shaky, shivering, trembling]
The Collaborative International Dictionary of English v.0.48:
Trembling \Trem"bling\, a.
   Shaking; tottering; quivering. -- Trem"bling*ly, adv.
   [1913 Webster]
   Trembling poplar (Bot.), the aspen.
      [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Tremble \Trem"ble\, v. i. [imp. & p. p. Trembled; p. pr. & vb.
   n. Trembling.] [F. trembler, fr. L. tremulus trembling,
   tremulous, fr. tremere to shake, tremble; akin to Gr. ?,
   Lith. trimti. Cf. Tremulous, Tremor.]
   1. To shake involuntarily, as with fear, cold, or weakness;
      to quake; to quiver; to shiver; to shudder; -- said of a
      person or an animal.
      [1913 Webster]
            I tremble still with fear.            --Shak.
      [1913 Webster]
            Frighted Turnus trembled as he spoke. --Dryden.
      [1913 Webster]
   2. To totter; to shake; -- said of a thing.
      [1913 Webster]
            The Mount of Sinai, whose gray top
            Shall tremble.                        --Milton.
      [1913 Webster]
   3. To quaver or shake, as sound; to be tremulous; as the
      voice trembles.
      [1913 Webster]
WordNet (r) 3.0 (2006):
trembling
    adj 1: vibrating slightly and irregularly; as e.g. with fear or
           cold or like the leaves of an aspen in a breeze; "a
           quaking bog"; "the quaking child asked for more";
           "quivering leaves of a poplar tree"; "with shaking
           knees"; "seemed shaky on her feet"; "sparkling light from
           the shivering crystals of the chandelier"; "trembling
           hands" [syn: shaky, shivering, trembling]
    n 1: a shaky motion; "the shaking of his fingers as he lit his
         pipe" [syn: shaking, shakiness, trembling, quiver,
         quivering, vibration, palpitation]
Moby Thesaurus II by Grady Ward, 1.0:
96 Moby Thesaurus words for "trembling":
   agitated, ague, all shook up, all-overish, aquiver, aspen, bashful,
   bumpiness, chattering, chorea, cold shivers, cowardly, didder,
   diffident, disquiet, disquietude, dithers, fearful, fearing,
   fearsome, fidgetiness, fidgeting, fidgets, fidgety,
   fits and starts, flutter, fluttery, goosy, heaving, in a quiver,
   in fear, inquietude, jactation, jactitation, jerkiness, jittery,
   joltiness, jumpy, mousy, nervous, palpitation, palsied, palsy,
   panting, pitapat, pitter-patter, quaking, quaver, quavering,
   quavery, quiver, quivering, quivery, rabbity, restlessness, scary,
   shakes, shaking, shaky, shiver, shivering, shivers, shivery,
   shook up, shrinking, shudder, shuddering, shy, skittery, skittish,
   spasms, startlish, succussatory, succussion, succussive, throb,
   throbbing, timid, timorous, tremble, trembly, tremor, tremulant,
   tremulous, tremulousness, trepidant, trepidation, trepidity,
   trigger-happy, twitchy, twitter, twittery, unrest, vibrating,
   vibration, wobbly