stealthful

from The Collaborative International Dictionary of English v.0.48

Stealthful \Stealth"ful\ (-f[.u]l), a.
   Given to stealth; stealthy. [Obs.] -- {Stealth"ful*ly}, adv.
   [Obs.] -- {Stealth"ful*ness}, n. [Obs.]
   [1913 Webster]