childishness

/ˈtʃaɪldɪʃnəs/📚 40177

the quality of being something that would be expected of or appropriate for a child.

I can't stand for your childishness.
我受不了你的孩子气了。

“ -ness” ⌜ 表示状态或质量的性质 - indicating the state or quality of ~ ⌟

单词造句:

源自childish/ˈtʃaɪldɪʃ/adj. 幼稚的，孩子气的

关联词manliness/ˈmænlinəs/n.刚毅