The word "realize" means to become aware of something or to understand something clearly. It can also refer to making something a reality or bringing something into existence. For example, when you finally understand a difficult concept in school, you might say, "I just realized that!"
The word "realize" comes from the late Middle English word "realisen," which means "make real." This is derived from the Old French " réaliser," which itself originates from "réel," meaning "real." The term literally implies turning something into reality.