tim·or·ous (tĭm'ər-əs) adj. Full of apprehensiveness; timid.
[Middle English, from Old French timoureus, from Medieval Latin timōrōsus, from Latin timor, timōr-, fear, from timēre, to fear.] tim'or·ous·ly adv., tim'or·ous·ness n.
c.1450, from O.Fr. temeros (14c.), from M.L. timorosus "fearful," from L. timor "fear," from timere "to fear." Some early sense confused by mistaken identification with M.E. temerous "rash" (see temerity).