Origin of boastful
Examples from the Web for boastfully
One night a male character, having to say boastfully to me: "I have my hand upon a fortune!"Life on the Stage|Clara Morris
They give us the sweepings of Mr Colburn's counter, and then boastfully proclaim the zeal with which they serve the public.
The same thought was in the mind of each: “He talks too boastfully to be much of a fighter.”The Boy Allies with the Cossacks|Clair W. Hayes
They were both the worse for rum they had had on the road, the big man talking very loud and boastfully.The Crossing|Winston Churchill
Long had the British boastfully claimed the title of monarch of the seas.The Naval History of the United States|Willis J. Abbot.