What Is An Enemy?

Enemy describes a person or group of persons that are opposed to another person or group. For a long time the word is being used to describe an opposing military force but nowadays the reason of the word has been widened widely and can be any body opposing something. Even two political rivals call themselves enemies of each other as they try to harm each others interests.
         
Sometimes even in sports the term has its use because the rivalry between the teams reach to the extent that players can do anything to win the game and that prompted people to use the term in this context.