Word Knowledge

What does the prefix hypo- mean? There are many words in the English language that include the prefix hypo-.  Some of these words include hypoactive, hypothermia, hypodermic, hypoglycemia, hypoallergenic, and hypoxia.  Hypo- is one of the many prefixes that I have included in my book, The ASVAB Tutor’s Word Knowledge and Paragraph Comprehension Study Guide.  I will present the answer tomorrow on what