Which prefix means under?

• A. Sub
• B. Supra
• C. Super
• D. Tel

Answer: (A)

Position in relation to another structure is shown with prefixes, and the one that means under is sub-. Sub- attaches to a root to indicate below or beneath, as in subcutaneous (under the skin), submerge (to put under water), or subterranean (beneath the surface). That direct meaning makes it the best fit for “under.”

The other options point to different directions or ideas. Supra- and super- both convey above or beyond, which is the opposite of under. Tel- isn’t a standard prefix for under; in medical language you’ll usually see tele- meaning distant, and tel- appears in other roots that relate to end or completion, not under.