unnerve|unnerved|unnerving

老板严厉的目光让他感到不安。

The boss's stern look ___unnerved him.

观众席上的嘘声让他紧张不安。

The booing from the audience ___unnerved him.

在黑暗的森林里独自行走让人感到不安。

Walking alone in the dark forest was ___unnerving.