pompous

adj. /ˈpɑːmpəs/ C2

自负的；虚夸的

Too serious, self-important, and formal in manner or speech.

仙境例句

The pompous Caterpillar spoke as if it were the King of the whole wood.

自命不凡的毛毛虫说起话来，好像它是整片树林的国王。