buckle (someone) seatbelt

Translations
пристегнуть (кого-то) ремень безопасности
You should always buckle your seatbelt before driving.
Вы всегда должны пристегивать ремень безопасности перед поездкой.
Definitions
To fasten or secure someone's seatbelt, typically in a car, airplane, or other vehicle, by inserting the metal tongue into the buckle to ensure safety during travel.