| Term | Definition |
| EXTRA | on the outside |
| extraneous | coming from outside; foreign, OR not essential or vital |
| extraneous sentences | 1) To study a virus, laboratory technitians must remove all extraneous matter. 2) Our history teacher said, "Keep to the subject; no extraneous details, please." |
| extraterrestrial | Outside or originating outside the limits of the earths atmosphere |
| terra | earth |
| extraterrestrial sentence | According to some scientists, the impact of an extraterrestrial object, such as a comet, caused conditions that led to the extinction of dinosaurs |
| extrovert | A person chiefly interested in things outside the self, directing thoughts outward rather than inward |
| vertere | to turn |
| extrovert sentence | Some extroverts express their social ease with facile talk and colorful clothing |