The Collaborative International Dictionary of English v.0.48:

Timid \Tim"id\, a. [L. timidus, fr. timere to fear; cf. Skr. tam
   to become breathless, to become stupefief: cf. F. timide.]
   Wanting courage to meet danger; easily frightened; timorous;
   not bold; fearful; shy.
   [1913 Webster]

         Poor is the triumph o'er the timid hare. --Thomson.
   [1913 Webster]

   Syn: Fearful; timorous; afraid; cowardly; pusillanimous;
        faint-hearted; shrinking; retiring.
        [1913 Webster] -- Tim"id*ly, adv. -- Tim"id*ness, n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

timidness
    n 1: fear of the unknown or unfamiliar or fear of making
         decisions [syn: timidity, timidness, timorousness]