timid by nature or revealing timidity; "timorous little
mouse"; "in a timorous tone"; "cast fearful glances at the large dog" Synonym(s):fearful, timorous, trepid
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Trepid \Trep"id\, a. [L. trepidus.]
Trembling; quaking. --Thackeray.