Summary: Prefixes are key morphemes in English vocabulary that begin words. The origin of the prefix *poly-* is from an ancient Greek word which meant "many." This prefix appears in, well, "many" English vocabulary words, such as [*poly*]syllabic, [*poly*]hedron, and [*Poly*]nesia. An easy way to remember that the prefix *poly-* means "many" is through the word [*poly*]gon, which is a geometric figure, such as a square or pentagon, that has "many" angles.
