Proscribe is a formal word meaning “to condemn or forbid something as harmful or unlawful.” More broadly, it can mean simply “to not allow something.”

// The town has passed an ordinance that proscribes the ownership of snakes and other exotic pets.

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“While the order proscribes new drilling along most of both the Atlantic and Pacific coasts, the order does not affect active drilling permits and carves out the most important areas of offshore production such as the western Gulf of Mexico near Texas and Louisiana.” — Jeff Young, Newsweek, 6 Jan. 2025

Signs, signs, everywhere, signs: some prescribe (“do this”) and others proscribe (“don’t do that”). Don’t take it as a bad sign if you have difficulty telling prescribe and proscribe apart, however; you’ve got plenty of company, and a good excuse. Proscribe and prescribe both come from Latin words that combine a prefix meaning “before” with the verb scribere, meaning “to write.” Yet the two words have very distinct, often nearly opposite meanings, hints of which emerge upon a closer look at their origins. Prescribe comes from praescribere, meaning “to dictate, order”—clear enough for a word used when making rules and giving orders. Proscribe has a more complex history: proscribere means both “to publish” and, more specifically, “to publish the name of someone who is condemned to death and whose property is now forfeited to the state.” This narrower meaning is the one proscribe carried into English when it was first used in the 15th century. By the early 17th century, the word had expanded from merely signaling condemnation to actual condemning or prohibiting.