The boss often browbeats employees with a threatening tone, making them afraid to voice their opinions.

### 解释 browbeats 是动词 browbeat 的第三人称单数现在时形式。browbeat 由 brow（眉毛）和 beat（击打）组成，字面意思是"用眉毛击打"，引申为"用严厉或威胁的态度压制他人"，即"威吓、训斥"。