Overly wordy, pompous, flowery, or elaborate.(adjective)
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Use "grandiloquent" in a sentence
"Overview: For his most popular book, Tom Brokaw coined the grandiloquent term ‘The Greatest Generation’ for the Americans who fought and triumphed in the crucible of World War II."
"Indeed, judged by Anglo-Saxon habit, they would be termed grandiloquent and verbose."
"The study also faults America for relying on "grandiloquent" rhetoric rather than careful diplomacy to build support for its missions."