Where does “inimīcus” come from?

inimīcus (Latin) comes from Latin amīcus, 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.

inimīcus (Latin): enemy, foe someone who is hostile to, feels hatred towards, opposes the interests of, or intends injury to someone else