Apples are healthy and stave off illnesses. / Healthy eating prevents illness.

(idiomatic) Mistreated; not properly cared for. / (colloquial, potentially offensive) Presumed to have had a significant number of lovers and showing the signs of overuse. (Typically said of women.)

Alternative form of when the cat's away the mice will play

To lock someone up in prison indefinitely.

To help in one way but proceed to harm in another.