ADJ-GRADED
(行为)有威胁性的，危险的
You can describe someone's behaviour as threatening when you think that they are trying to harm you.
例句
The police could have charged them with threatening behaviour...
警方本可指控他们恐吓。
She said Denny had received a threatening letter and asked me if I sent it.
她说丹尼收到一封恐吓信，并问是不是我寄的。