When you criticize or reprimand someone, you express reproval. Your parents' reproval will be understandable if you borrow their car without asking and then drive it into a tree.
A judge may convey her reproval to a defendant who's found guilty with an especially harsh sentence. Your reproval of your dog for chewing your new shoes could take the form of an angry expression on your face, and a stern, "No!" The noun reproval comes from the verb reprove, "reprimand," from the Late Latin root reprobare, "disapprove, reject, or condemn."