This document discusses Greek and Latin root words that are commonly found in English words related to water, the sea, mind, study, knowledge, circles, around, middle, saying, writing, and recording. It provides the meaning and origin of root words like hydr/aqua, mar/mer, mem, ology, sci, cycl, circ/circum, centr/center, dict, scrib/script, and graph/gram and examples of English words derived from each root.