Definition from macmillandictionary.com
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He’s been threatening me for months.
The terrorists are threatening to kill the hostages.
One man has been threatened with legal action.
My life has been threatened on several occasions.
NATO has threatened air strikes against the capital.
the cancer that now threatens his life
Their actions threaten the stability and security of the region.
Many workers feel that their jobs are threatened.
Nuclear testing threatens to destroy our environment.
Rain was threatening, and it had turned cold.
The wildebeest return to the herd when danger threatens.