Pronoun - Wikipedia
https://en.wikipedia.org/wiki/PronounIn linguistics and grammar, a pronoun (abbreviated PRO) is a word or a group of words that one may substitute for a noun or noun phrase. Pronouns have traditionally been regarded as one of the parts of speech, but some modern theorists would not consider them to form a single class, in view of the variety of functions they perform cross-linguistically. An example of a pronoun is "you", which is both plural and singular…