IPA: /ˈθrɛtən/
KK: /ˈθrɛtən/
To express an intention to cause harm or danger to someone or something.
He tends to threaten others when he is angry.
Past: threatened
Past Participle: threatened
To say that you will cause harm or trouble to someone if they do not do what you want.
He threatened to tell her secret if she didn't help him.
Past: threatened
Past Participle: threatened
Threaten → It is formed from the root "threat" (from Old English *þreat*, meaning a crowd or a force) and the suffix "-en" (indicating to make or to cause). The word "threaten" means to make a force or danger known, implying an intention to cause harm or danger.
Think of a 'force' or 'crowd' ('threat') that is being made known to someone, which helps you remember that to threaten means to indicate a potential danger.