'Prescribe' means to order or recommend (a doctor prescribes medicine); 'proscribe' means to officially forbid or ban something.
Verb. To officially recommend or order a treatment, medication, or course of action. A doctor prescribes medicine; a rulebook prescribes procedures.
The doctor prescribed a two-week course of antibiotics and advised complete bed rest.
Company policy prescribes a formal written warning before any disciplinary action.
The constitution prescribes the procedures for amending its own articles.
Verb. To officially forbid or ban something. To prohibit by law or authority. To declare a practice, organisation, or person outlawed.
The organisation was proscribed by the government following a series of violent incidents.
The new law proscribed the use of certain pesticides within fifty kilometres of waterways.
Proscribed speech in public spaces became a major point of contention in the new regulations.
Common mistake
"The doctor proscribed bed rest" when meaning ordered (correct: prescribed). Or "The law prescribes certain chemicals" when meaning bans them (correct: proscribes). These are virtual antonyms — one orders, the other bans. In medical, legal, and regulatory writing, mixing them up has serious practical consequences.
Trick to remember it
'Prescribe' = PRE (before) + scribe (write) — the doctor writes before you take the medicine. 'Proscribe' = PRO (away) + scribe (write) — something written away, banished. PRE = write it in; PRO = write it out.
Quick rule
Is it to order, recommend, or prescribe medically? 'Prescribe'. Is it to officially ban or forbid? 'Proscribe'.
Did you know?
'Prescription' comes from Latin 'praescriptio' (a written order in advance). The Rx symbol on prescriptions comes from Latin 'recipe' (take!, imperative of 'recipere'). 'Proscribe' comes from Latin 'proscribere' (to write a name publicly as an enemy of the state) — literally 'to write out', as in writing someone's name on the proscription list. In ancient Rome, dictators like Sulla published proscription lists (proscriptio): anyone named on the list could be legally killed, and their property was forfeit. The distinction prescribe/proscribe captures the entire range of written authority — from the healing order to the death sentence.
Exercise 1 · Pick the right one
The regulation _____ s the disposal of chemical waste within five kilometres of any water source.
Exercise 2 · Pick the right one
The specialist _____ d a six-week course of physiotherapy after the knee operation.
Exercise 3 · Form the word
Is it to order, recommend, or prescribe medically? 'Prescribe'. Is it to officially ban or forbid? 'Proscribe'.
"The doctor proscribed bed rest" when meaning ordered (correct: prescribed). Or "The law prescribes certain chemicals" when meaning bans them (correct: proscribes). These are virtual antonyms — one orders, the other bans. In medical, legal, and regulatory writing, mixing them up has serious practical consequences.
'Prescribe' = PRE (before) + scribe (write) — the doctor writes before you take the medicine. 'Proscribe' = PRO (away) + scribe (write) — something written away, banished. PRE = write it in; PRO = write it out.
Bryan López
Founder of SpeakUP Academy