Which prefix means "under" in Greek?

The prefix "hypo-" originates from Greek and means "under" or "beneath." It is commonly used in various scientific and medical terms to indicate something that is below normal levels or is situated beneath something else. For instance, in the term "hypoglycemia," it indicates a level of glucose that is lower than normal.

In contrast, "hemi-" refers to "half," "amphi-" denotes "both" or "around," and "auto-" means "self." Each of these prefixes has a distinct meaning that does not relate to the concept of being "under." Therefore, the understanding of "hypo-" as it pertains to the meaning of "under" is key in identifying the correct answer in this context.