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threat‧en S2 W2

1 [transitive] to say that you will cause someone harm or trouble if they do not do what you want :
Postal workers are threatening a strike if they don't receive a pay increase.
Postal workers are threatening a strike if they don't receive a pay increase. threaten somebody with something
Doctors are sometimes threatened with violence if they don't do what patients want.
Doctors are sometimes threatened with violence if they don't do what patients want.2 [transitive] to be likely to harm or destroy something :
Poaching threatens the survival of the rhino.
Poaching threatens the survival of the rhino. threaten to do something
The incident threatens to ruin his chances in the election.
The incident threatens to ruin his chances in the election.3 [intransitive and transitive] to be likely to happen or be in a bad situation :
Britain's fishing industry remains threatened.
Dark clouds threatened rain.
Britain's fishing industry remains threatened.
Dark clouds threatened rain.