My

My is used before a noun to show that something belongs to or is connected with the speaker, as in “my book” or “my idea.” It marks personal possession or relationship.

From Old English *mīn*, the possessive form of *ic* “I,” related to German *mein* and Dutch *mijn*. Over time, English developed *my* for use before consonant sounds and kept *mine* mainly for use on its own.