The word subject comes from the Latin "subiectus", which means to put under or submit. This word has several uses in our language; one of them is to describe the person or individual who is being talked about, but their name is not known, or is being mentioned. But on the other hand, the term subject refers to something that is firmly grasped or captured by a thing or person, therefore it cannot be moved from a certain place, nor can it escape or fall. Subject is also understood to be the entity that submits or is exposed to another person or thing in particular.
In the philosophical environment, the subject is the one from whom something is announced or predicated, this is the one who proceeds according to his will and decision, is the one who leads his actions, and is in a position to differentiate reality as an object beyond your subjective knowledge.
In grammar, the person, thing or animal that is spoken or said something is called or known by subject, in other words it is the one that performs the action of the verb, which can be replaced by a pronoun or a noun, which is called the nucleus of the subject. The subject attached to the predicate is one of the most important elements of sentences. The characteristics of a subject are, first it exposes who causes, performs or suffers the action; and second is that of whom something is affirmed or denied.
