Source : Webster's Revised Unabridged Dictionary (1913)

Ungraceful \Un*grace"ful\, a.
   Not graceful; not marked with ease and dignity; deficient in
   beauty and elegance; inelegant; awkward; as, ungraceful
   manners; ungraceful speech.

         The other oak remaining a blackened and ungraceful
         trunk.                                   --Sir W.
                                                  Scott.
   -- {Un*grace"ful*ly}, adv. -- {Un*grace"ful*ness}, n.

Source : WordNet®

ungracefulness
     n : an unpleasant carriage [syn: {gracelessness}]