Which prefix means "backwards"?

• A. Before, for, an account of
• B. One
• C. Under
• D. Backwards

Answer: (D)

Understanding prefixes involves seeing how they convey direction or relation. When a prefix is said to mean backwards, it should clearly indicate moving in reverse or behind in time or space. The best choice is the one that literally carries the meaning backwards itself. That option directly signals the sense required by the question, so it aligns most closely with what the prompt is asking.

The other options point to different ideas: one relates to numerical sense (one), another to position beneath (under), and the remaining choice groups senses like before, for, and an account of, which don’t specifically denote backwards. While in real vocabulary you might think of a standard prefix for backwards such as retro-, the prompt’s form makes the option that states backwards the most appropriate pick.