This document discusses the origins and meanings of common Latin and Greek prefixes, roots, and suffixes used in English words. It provides examples of over a dozen word parts from Latin and Greek, including hydra, aud, phon, mar, mem, sci, ology, cycl, circ/cirum, centr/center, dict, scrib/script, and graph/gram, and their meanings relating to water, hearing, sound, sea, mind, knowledge, study, circle, around, middle, say/declare, write, and write/draw/describe respectively.