grandiosity

他不断夸大自己的成就，表现出明显的妄自尊大。

He constantly exaggerated his achievements, showing clear signs of ___grandiosity.

这座宫殿的设计充满了浮夸的风格，金碧辉煌的装饰显得过于夸张。

The palace's design was full of ___grandiosity, with its overly extravagant golden decorations.