An uncooperative witness.
Sometimes your clients are uncooperative, and the pay will not make you wealthy either.
They sometimes please others if it suits them but may also be uncooperative.
It can be difficult to ensure a child gets all of the necessary nutrients, since many children are picky eaters, or may be uncooperative about trying new foods.
Don't become frustrated if the autistic student has a bad day or is uncooperative.
misbehave in this manner they can become uncooperative, unusable and dangerous.