Where does “unpossessive” come from?
unpossessive (English) comes from English possessive, from Middle French possessif, from Latin possessivus, from Latin possideō, from Latin potis, from Proto-Italic potis, from Proto-Indo-European pótis, from Proto-Indo-European ph₃tis — to drink.
unpossessive (English): Not possessive
Ancestry of “unpossessive”, step by step