Boast"ful*ly

from The Collaborative International Dictionary of English v.0.48

Boastful \Boast"ful\, a.
   Given to, or full of, boasting; inclined to boast; vaunting;
   vainglorious; self-praising. -- {Boast"ful*ly}, adv. --
   {Boast"ful*ness}, n.
   [1913 Webster]