#verb#behavior#abstract#ephemeral#vivid
扬言要；威胁；恐吓
He threatened to expose her secret if she didn’t do what he asked.
他威胁要揭露她的秘密，如果她不按他的要求做的话。
预示凶兆；有…危险
A storm was threatening.
暴风雨即将来临。
The dark clouds and strong winds threaten a storm.
乌云和强风预示着暴风雨的来临。