Which prefixes indicate "half"?

• A. "hemi-" and "pan-"
• B. "pan-" and "semi-"
• C. "semi-" and "ambi-"
• D. "hemi-" and "semi-"

Answer: (D)

The prefixes that indicate "half" are "hemi-" and "semi-." "Hemi-" is derived from Greek and specifically means "half," and is often used in medical terminology to describe conditions involving half of the body, such as hemiplegia, which refers to paralysis on one side. On the other hand, "semi-" comes from Latin and means "half" or "partially," as seen in words like semicircle, which refers to half of a circle. Together, these prefixes effectively convey the concept of something being divided into two equal parts or representing half of a whole.

The other choices contain prefixes that do not convey the meaning of "half" accurately. For instance, "pan-" typically means "all" or "entire," which does not relate to the concept of halving something. Similarly, "ambi-" means "both" or "on both sides," and it also does not suggest the meaning of half. Therefore, the combination of "hemi-" and "semi-" is what correctly identifies the concept of 'half.'