Where does “desamar” come from?

desamar (Spanish) comes from Spanish amar, from Old Spanish amar, from Latin amō, from Latin Deus, from Latin dẹ̄vos, from Old Latin deivos, from Proto-Italic deiwos, from Proto-Indo-European deywós — to be bright; sky, heaven.

desamar (Spanish): to stop loving; to fall out of love with