Which prefix indicates a condition of being "slow"?

The prefix "Brady-" is derived from the Greek word "bradys," meaning slow. In medical terminology, it is commonly used to describe conditions that involve a slower than normal rate. For example, terms like bradycardia refer to a slower heart rate, indicating that this prefix is specifically tied to the notion of slowness.

This understanding is reinforced by the fact that the other prefixes do not convey the same meaning. The prefix "Dys-" typically indicates difficulty or abnormality rather than slowness, while "A-" and "An-" refer to absence or lack. The prefix "Anti-" denotes opposition or counteraction. Thus, "Brady-" is distinctly associated with slowness, making it the correct choice for identifying a condition related to being slow.