The verb prescribe means to establish, direct, or lay down as a rule. The verb proscribe means to ban, forbid, or condemn.
Examples:
- "Doctors are men who prescribe medicines of which they know little, to cure diseases of which they know less, in human beings of whom they know nothing."
(Voltaire) - "When a legislature undertakes to proscribe the exercise of a citizen's constitutional rights it acts lawlessly and the citizen can take matters into his own hands and proceed on the basis that such a law is no law at all."
(William Orville Douglas)
Practice:
(a) In no state are psychologists permitted to _____ medication.(b) China's laws tightly _____ public demonstrations.

