Which prefix means 'back, again'?

Which prefix means 'back, again'?

• A. Peri
• B. Patho
• C. Post
• D. Re

Answer: (D)

The idea behind prefixes in medical terms is to add a location, direction, or state to a root word. The prefix that means back or again is re-. It signals repetition or a return to a previous state, as in redo, reappear, or rewrite. The other prefixes don’t convey the idea of back or again: peri- means around, patho- means disease, and post- means after. So the prefix that fits the meaning “back, again” is re-.

The idea behind prefixes in medical terms is to add a location, direction, or state to a root word. The prefix that means back or again is re-. It signals repetition or a return to a previous state, as in redo, reappear, or rewrite. The other prefixes don’t convey the idea of back or again: peri- means around, patho- means disease, and post- means after. So the prefix that fits the meaning “back, again” is re-.