Extortion
Noun and する verb
きょうかつ
不倫をダシにヤクザに恐喝されています。
The yakuza is using my adultery to blackmail me.
A man in a leather jacket scolds you and is using fear tactics to get paid. He's blackmailing you! That's illegal. Come to think of it, he's probably a member of the yakuza. You should move.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.