grandiloquent

adjective

gran·​dil·​o·​quent gran-ˈdi-lə-kwənt 

: marked by a lofty, extravagantly colorful, pompous, or bombastic style, manner, or quality especially in language

a grandiloquent and boastful speech about his great accomplishments

danced to a rarely heard, grandiloquent … score

—Janet Flanner

the latter's Self Portrait … was done in a more grandiloquent manner

—Wolfgang Stechow

with a grandiloquent gesture

—Willard Robertson

the grandiloquent hero of a drama

—Mary Webb

grandiloquent summer estates

—Bernard DeVoto

grandiloquently adverb

Word History

Etymology

probably back-formation from grandiloquence

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