Where does “operar” come from?

operar (Spanish) comes from Latin operāre, from Latin operārī, from Latin Opus, from Ancient Greek Ὀποῦς, from Ancient Greek ὀπός, from Proto-Indo-European sokʷós, from Proto-Indo-European sekʷ- — to follow; to see; to say.

operar (Spanish): to operate; to produce, to achieve; to undergo...