undertone

/ˈʌn.dɚ.toʊn/

名词

（文章或讲话的）含意，弦外之音；（事件或情况的）蕴含意义
It was a comedy act with an undertone of cruelty.
这是一个有点儿残忍的喜剧节目。
轻声地，低声地
Freddie muttered something to me in an undertone.
弗雷迪轻声向我嘀咕了些什么。