mío
/ˈmio/ · A1 · pron
mine
mío = me + o: the thing that belongs to me, from Latin meus
Mío comes from Latin meus, the same root as English me, my and mine. The m- is the first-person marker across all of them. It follows the noun or stands alone: un amigo mío = a friend of mine; es mío = it is mine.