IPA: //ˈpɒmpəsnəs//
KK: /ˈpɑmpəsnəs/
The quality of being overly self-important or arrogant, often in a way that is exaggerated or pretentious.
His pompousness made it difficult for others to relate to him.
Pompousness → It is formed from "pompous" (from Latin *pomposus*, meaning full of pomp or grandeur) and the suffix "-ness" (meaning the state or quality of). The word "pompousness" refers to the state of being pompous or exhibiting excessive self-importance.
Think of someone who is 'full of grandeur' ('pomposus') and remember that 'pompousness' describes the quality of being overly self-important.