The Collaborative International Dictionary of English v.0.48:
Cautelous \Cau"te*lous\, a. [F. cauteleux, LL. cautelosus. See Cautel.] 1. Caution; prudent; wary. [Obs.] "Cautelous, though young." --Drayton. [1913 Webster] 2. Crafty; deceitful; false. [Obs.] --Shak. -- Cau"te*lous*ly, adv. -- Cau"te*lous*ness, n. [Obs.] [1913 Webster]