Where does “σχεδιάζω” come from?

σχεδιάζω (Ancient Greek) comes from Ancient Greek σχέδιος, from Ancient Greek σχεδόν, from Ancient Greek ἔχω, from Proto-Hellenic hékʰō, from Proto-Indo-European seǵʰ- — to hold; to overpower.

σχεδιάζω (Ancient Greek): do a thing offhand; to do a thing off-hand