那个新员工被老板不断威吓，最后变得完全沉默。

The new employee was browbeaten by the boss until he became completely silent.

browbeaten 是动词 browbeat 的过去分词形式。browbeat 由 brow（眉毛）和 beat（击打）组成，字面意思是"用眉毛击打"，引申为"用严厉的目光或言语威吓、恐吓"。browbeaten 表示"被威吓的、被欺凌的"。