Coercion is the use of force or threat or intimidation to force someone to do something against their will in order to obtain desirable outcomes. In legal practice, it could mean threatening a witness to falsify his/her testimony. A threat could be in any form, whether a physical injury or financial loss or any other form of mental or psychological torture. The threat is maintained until the desired results are obtained. Coercion is a crime and deprives the victim of his or her free will.
Coercion, as already stated, is usually accomplished by actual physical injury, threat of the same, threat of disclosure of secret information, and threat to one's family or resources. All are used to get the agreement of the victim or to force him to do what is intended by the coercer.