bravado

他所有的虚张声势都掩盖不了他内心的恐惧。

All his ___bravado couldn't hide the fear in his eyes.

他在对手面前炫耀的勇气不过是虚张声势罢了。

His display of ___bravado in front of the opponent was just a bluff.

他用虚张声势的语气说话，但颤抖的手暴露了他的恐惧。

He spoke with ___bravado, but his trembling hands gave away his fear.