The Collaborative International Dictionary of English v.0.48:

Wariness \Wa"ri*ness\, n.
   The quality or state of being wary; care to foresee and guard
   against evil; cautiousness. "An almost reptile wariness."
   --G. W. Cable.
   [1913 Webster]

         To determine what are little things in religion, great
         wariness is to be used.                  --Sprat.
   [1913 Webster]

   Syn: Caution; watchfulness; circumspection; foresight; care;
        vigilance; scrupulousness.
        [1913 Webster]

WordNet (r) 3.0 (2006):

wariness
    n 1: the trait of being cautious and watchful [syn: wariness,
         chariness] [ant: unwariness]