The concept of antagonistic is used in our language to refer that someone or something manifests antagonism.
Something or someone expressing opposition to another
The antagonism will be that opposition both in doctrines and opinions, or failing that, the reciprocal opposition or the opposite action that can be generated in muscles, organisms, or by the consumption of certain medications.
In the first sense we can speak of two antagonistic ideologies or of two antagonistic political parties, being denominated in this way because they do not coincide in any proposal but rather the opposite, they are totally opposed, for example, in the economic plane, one defends the free market and the other state intervention.
Application of the concept in various contexts
We can also apply the concept in other contexts such as biology, literature, medicine and politics as we have already seen.
In the specific case of biology, it is said that two muscles are antagonists when they exert opposite forces, such is the case of the biceps and the triceps that are located in the upper part of our arm.
This concept is widely used in our language and is especially associated and applied to those people or fictitious characters whose function is to act contrary or opposite to the protagonist, in reality, or in fiction, as we said about a movie , a TV show or a play.
Person who in reality or fiction acts opposite to another
Although in real life we cannot distinguish between main and secondary characters, the antagonistic concept can be applied to a person who acts in the opposite or opposite way to another, being for that moment his direct antagonist. Usually, in fictional stories, the main characters must always have an antagonist in order to generate conflicts and situations that must be resolved.
If we analyze the antagonistic term etymologically, we will see that it comes from the Greek, where it means 'the one who opposes another'. While the prefix 'anti' always means 'opposite of', agonistis is a Greek term used to designate players, fighters. A) Yes, antagonistis in Greek it will represent the one who opposes a player, fighter, character. In the same way, the term protagonist arises, which means 'the player or fighter first'.
The other side of the protagonist in fiction
The notion of antagonist arises especially in literature and in oral tradition as a figure that opposes the protagonist or main character of a given story. The figure of the antagonist will always be that of a character who will oppose the wishes, desires and projects of the main character, obstructing his path or directly preventing it. In this way, the dichotomy and dialectic that is established between two parties is what leads to confrontation and the development of conflicts that must be resolved throughout history.
In general, the antagonists tend to be evil, troublesome, envious characters with mostly negative traits. This is so because the protagonist or main character will be the one with whom the audience or reader must identify and be recognized. In some cases the antagonistic character may end up disappearing, in other cases he may end up winning (although this is not the most common) and he may also agree with the protagonist for the common good.
Now, we must also say that the antagonist is not always an evil and perverse character who seeks to harm his opponent because yes, although it is a reality that does maintain substantial differences with the protagonist, either in terms of opinions, ideas, or ways of acting.
In a fictional story, the antagonist is a character that can never be absent, because without a doubt the story will be very boring.
The antagonist knows how to put the story that is told "seasoning", since it exposes the annoyance and is the trigger of the conflicts. If he weren't there, everything would be rosy in the story in question, and obviously it wouldn't be fun at all to appreciate.
The viewer usually identifies and takes the side of the heroes, and for example the opposite side of the antagonists, although there are exceptions.