Where does “amīcus” come from?

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

amīcus (Latin): friendly, well-disposed, amicable