What is Blackmail ?
Blackmail is (verb) 1. to threaten to do something harmful to someone unless they do what you want They tried to blackmail the government into releasing prisoners of war. 2. to make someone give you money by threatening to tell people a secret that they have Her former cook tried to blackmail her. (noun) the act of blackmailing The government will not give in to terrorist blackmail. Synonym extortion
source: Easier English, Student Dictionary Upper Intermediate Level