'Stealthiest' definitions:

Definition of 'Stealthiest'

From: GCIDE

Stealthy \Stealth"y\ (-[y^]), a. [Compar. Stealthier (-[i^]*[~e]r); superl. Stealthiest.] Done by stealth; accomplished clandestinely; unperceived; secret; furtive; sly. [1913 Webster]
[Withered murder] with his stealthy pace, . . . Moves like a ghost. --Shak. [1913 Webster]