pompous
UK: ˈpɒmpəs | US: ˈpɑːmpəs
adj. excessively self-important or showy in manner or speech
adj. characterized by exaggerated grandeur or pretentiousness
The word "pompous" derives from the Old French pompeux, which traces back to Latin pomposus (stately, splendid), itself from pompa (procession, display). The root pomp originally referred to ceremonial grandeur but evolved to imply excessive showiness or vanity. The suffix -ous (from Latin -osus) denotes "full of," giving "pompous" its modern meaning of "full of exaggerated self-importance."
The mayor's pompous speech bored the audience with its self-praise.
She dismissed his pompous attitude as a cover for insecurity.
The restaurant's pompous decor made it feel unwelcoming.
His pompous claims about his achievements were quickly debunked.
Avoid using pompous language when simplicity will suffice.