thrasonical
Boastful, bragging, vainglorious.
The Sorbonicall clamours (which at Paris I haue ſene in time paſt whē poperie moſt raigned) might be worthily thought in compariſon of thys traſonicall oſtentation to haue had much modeſtie.
Where it comes from
From Latin Thrasō, Thrason-, the name of a boastful soldier in the play Eunuchus by Terence. The name is derived from Ancient Greek θρασύς (thrasús, “bold, audacious”).
Adapted from the Wiktionary entry thrasonical (CC BY-SA 4.0).