Bruxism Say: bruk-sih-zum Take a bite out of this - bruxism is the word for grinding your teeth, usually during sleep. It comes from brychein, a Greek word for gnashing the teeth. Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.