Answer: threatening; illegal; incapable; suing
Explanation: Duress simply means coercing, pressuring or forcing an individual to perform an unwilling action.
Therefore, To establish duress, there must be proof of a threat to do something that the threatening party has no right to do, Generally the threatening act must be wrongful or illegal and must render the threatened person incapable of exercising free will. A threat to do something legal such as suing someone ordinarily is not Duress.