What is the meaning of the prefix 're-'?

• A. Back, Again
• B. Half
• C. Over, More
• D. Across

Answer: (A)

The prefix re- signals doing something again or returning to a previous state. It carries the sense of repetition or going back, as in redo (do again), rewrite (write again), return (come back), or revert (go back to a prior condition). That’s why “Back, Again” is the best fit—it captures both notions of moving back and doing something again.

The other options point to different ideas: half is conveyed by semi-, over or more by over- or hyper-, and across by trans- or similar prefixes. These meanings don’t express repetition or returning, which is the core idea of the re- prefix.