Which prefix means "Fast"?

Which prefix means "Fast"?

• A. Sub
• B. Supra
• C. Pathogen
• D. Tachy

Answer: (D)

Tachy- is the prefix that means fast. It comes from the Greek word tachys meaning swift, and it’s used in medical terms to describe rapid processes. For example, tachycardia refers to a fast heart rate, and tachypnea describes rapid breathing. The other options aren’t prefixes meaning fast: sub- means under or below, supra- means above or beyond, and pathogen is a word part referring to a disease-causing agent, not a prefix.

Tachy- is the prefix that means fast. It comes from the Greek word tachys meaning swift, and it’s used in medical terms to describe rapid processes. For example, tachycardia refers to a fast heart rate, and tachypnea describes rapid breathing. The other options aren’t prefixes meaning fast: sub- means under or below, supra- means above or beyond, and pathogen is a word part referring to a disease-causing agent, not a prefix.