blackmail
US /ˈblæk.meɪl/
UK /ˈblæk.meɪl/

1.
the action, treated as a criminal offense, of demanding money from a person in return for not revealing compromising or damaging information about them.
:
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He was arrested for attempting to blackmail a wealthy businessman.
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The politician claimed he was a victim of blackmail.
1.
demand money or another benefit from (someone) in return for not revealing compromising or damaging information about them.
:
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They tried to blackmail him with old photographs.
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She refused to be blackmailed into signing the contract.