他对这部电影的评论充满了乏味和空洞。

His review of the movie was full of boredom and inanity.

inanity 是名词，由形容词 inane（空洞的、无意义的）加上名词后缀 -ity 构成。inane 来自拉丁语 inanis，意思是"空的、无价值的"。inanity 指"空洞无物、愚蠢无聊"的状态或内容。