threat+en

• threat威胁，恐吓
• -en使成为，使变得

threaten 由 threat（威胁）和 -en（使成为）组成，表示使成为威胁，即威胁、恐吓。

threat

威胁，恐吓

threatening

威胁的，恐吓的

strengthen

加强，巩固

lengthen

延长，加长

1. 释义 1威胁，恐吓

   He threatened to leave if he didn't get a raise.

2. 释义 1威胁，恐吓

   The dark clouds threatened rain.

3. 释义 1威胁，恐吓

   She felt threatened by his aggressive behavior.