The Collaborative International Dictionary of English v.0.48:

Unwilling \Un*will"ing\, a.
   Not willing; loath; disinclined; reluctant; as, an unwilling
   servant.
   [1913 Webster]

         And drop at last, but in unwilling ears,
         This saving counsel, "Keep your piece nine years."
                                                  --Pope.
   [1913 Webster] -- Un*will"ing*ly, adv. --
   Un*will"ing*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

unwillingness
    n 1: the trait of being unwilling; "his unwillingness to
         cooperate vetoed every proposal I made"; "in spite of our
         warnings he plowed ahead with the involuntariness of an
         automaton" [syn: unwillingness, involuntariness] [ant:
         willingness]