Summary: Prefixes are key morphemes in English vocabulary that begin words. The Greek prefix *hypo-* is an important morpheme of the English language. Examples using this prefix include [*hypo*]thermia and [*hypo*]critical. An easy way to remember that the prefix *hypo-* means "under" is through the adjective [*hypo*]dermic, which refers to going "under" the skin, especially when being given a shot.
