The Collaborative International Dictionary of English v.0.48:

Bemuse \Be*muse"\, v. t.
   To muddle, daze, or partially stupefy, as with liquor.
   [1913 Webster]

         A parson much bemused in beer.           --Pope.
   [1913 Webster] Ben

WordNet (r) 3.0 (2006):

bemuse
    v 1: cause to be confused emotionally [syn: bewilder,
         bemuse, discombobulate, throw]