arrogant

The billionaire's arrogant attitude made it difficult for him to keep friends.

(Chinese) 这位亿万富翁傲慢的态度使他很难维持友谊。

It is arrogant to assume that you are the only one who knows the correct answer.

(Chinese) 认为只有自己知道正确答案，这种想法是很傲慢的。