The Collaborative International Dictionary of English v.0.48:

Exceptionable \Ex*cep"tion*a*ble\
   ([e^]k*s[e^]p"sh[u^]n*[.a]*b'l), a.
   Liable to exception or objection; objectionable. --
   Ex*cep"tion*a*ble*ness, n.
   [1913 Webster]

         This passage I look upon to be the most exceptionable
         in the whole poem.                       --Addison.
   [1913 Webster]