This document discusses Greek and Latin root words that are commonly found in English words. It provides the meaning and origin of root words like hydr/aqua (water), mar/mer (sea), vis/vid (to look or see), aud (to hear), phon (sound), mem (mindful or recall), ology (study), sci (to know), cycl (circle), circum/circ (around), centr/center (middle), dict (to say or declare), graph/gram (write), and scrib/script (write) and examples of English words they are found in like dehydrate, aquatic, maritime, vista, audible, cacophony, memoir, geology, science, cyclical,