my

The word "my" is the modern English possessive adjective derived from the Old English genitive form mīn, meaning "of me" or "belonging to me." This Old English form itself stems from the Proto-Germanic mīnaz, which is the genitive of the first-person singular pronoun. The form simplified over time, losing its final -n in Middle English, a process common in unstressed words. Its core function has remained remarkably consistent for over a millennium, directly linking the speaker to an object or concept as its possessor.

This is a simplex word, a possessive adjective form of the first-person singular pronoun "I". It originates from Old English mīn, the genitive (possessive) case of ic ("I"). Its functional role is as a determiner indicating possession or association.