unbuckle

/ˈʌnˌbʌkəl/

Other forms: unbuckled; unbuckling; unbuckles

To unbuckle is to release a belt or clasp — to unfasten. You're going to have to unbuckle your seat belt before you get out of the car.

The verb unbuckle adds the prefix un- (""reverse of") to buckle, which stems from the Latin word buccula, "cheek strap of a helmet." So just as you buckle your helmet before you jump on your bike, you unbuckle it once you arrive at your friend's house.

Definitions of unbuckle

1. verb

   undo the buckle of
   “Unbuckle your seat belt”

   antonyms:

   buckle

   fasten with a buckle or buckles

   type of:

   undo

   cancel, annul, or reverse an action or its effect