Thank you for your question.
Extortioner in English means one who obtains from another by force, intimidation, or undue or illegal power.
The Greek word translated extortioners is used as follows
Matthew 7:15 Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening <727> wolves.
Luke 18:11 The Pharisee stood and prayed thus with himself, God, I thank thee, that I am not as other men are, extortioners <727>, unjust, adulterers, or even as this publican.
1 Corinthians 5:10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners <727>, or with idolaters; for then must ye needs go out of the world.
11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner <727>; with such an one no not to eat.
1 Corinthians 6:10 Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners <727>, shall inherit the kingdom of God.
Using Strong’s Concordance:
Extortioners <727> Greek ‘harpax’ Translated in the AV-extortioner 4, ravening 1; 5
Meaning: 1) rapacious, ravenous; 2) an extortioner, a robber.
I hope this helps,