thrasonical
adjective
thra·son·i·cal thrā-ˈsä-ni-kəl 
thrə-
: of, relating to, resembling, or characteristic of Thraso : bragging, boastful
thrasonically
thrā-ˈsä-ni-k(ə-)lē
adverb 
Did you know?
Thraso was a blustering old soldier in the comedy Eunuchus, a play written by the great Roman dramatist Terence more than 2,000 years ago. Terence is generally remembered for his realistic characterizations, and in Thraso he created a swaggerer whose vainglorious boastfulness was not soon to be forgotten. Thraso's reputation as a braggart lives on in "thrasonical," a word that boasts a history as an English adjective for more than 450 years.
Word History
Etymology
Latin Thrason-, Thraso Thraso, braggart soldier in the comedy Eunuchus by Terence
First Known Use
1564, in the meaning defined above