demand (something) of (someone or something)

To insist that someone or something do, provide, or relinquish something. I demand the full attention of my students, so if you plan to nap or socialize in here, then you might as well drop this class right now. You're really demanding a lot of our washer by throwing such a big load in there. She demands a lot of her interns—namely, full cooperation. Hope you're OK with fetching coffee and doing any menial task she can think of.