Impeachment é the act or effect of challenging, i.e, to contest, to refute, to contradict, to resist, to oppose. It is the action of not admitting an opinion, of denying the truth of a fact.
Dispute is a feminine noun that means to contradict or rebut with arguments, it is the action of contesting, undoing or trying to undo the reasons or objections of others.
Dispute is the act or effect of placing oneself in such a way as to form an obstacle, to impede, to oppose ideas or arguments contrary to one's own.
The challenger is the one who challenges, that is, who processes the act of challenge, who opposes an argument, which is positioned against a cause.
In the legal area impugnation is one of the basic means of reaction against an execution that has already been instituted. It is a procedural act that takes place through in challenge petition in which to search annul or undo a procedural act considered unfair. It is the gathering of arguments for the purpose of challenging, of cancel a previously approved action.
See also the meaning of Monitoring action.