inertiathe tendency of a body at rest to stay at rest and a body in motion to keep movingA passenger lurches forward when a car stops suddenly because of their body's inertia.NoteA passenger lurches forward when a car stops suddenly because of their body's inertia.Elon.io is an online learning platformWe have an entire course teaching TOEFL Academic Vocabulary grammar and vocabulary.Start learning TOEFL Academic Vocabulary now