Dictionary.com
Thesaurus.com
Synonyms

unbuckle

American  
[uhn-buhk-uhl] / ʌnˈbʌk əl /

verb (used without object)

unbuckles, present (3rd person singular) unbuckled, past participle, past unbuckling present participle
  1. to unfasten the buckle or buckles of.


verb (used without object)

unbuckles, present (3rd person singular) unbuckled, past participle, past unbuckling present participle
  1. to undo a buckle.

Other Word Forms

Inflected Forms

Participles

Conjugated Forms

Present

Past

Future

Etymology

Origin of unbuckle

First recorded in 1350–1400, unbuckle is from the Middle English word unboclen. See un- 2, buckle

Explanation

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.

Keep Reading on Vocabulary.com

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"I managed to unbuckle myself, used my leg to push through that opening, and crawled out," Vishwashkumar Ramesh told Indian state media DD News.

From BBC Jun. 13, 2025

After crossing in complete silence, he turned and told me to unbuckle the straps on my pack and follow exactly in his footsteps.

From Los Angeles Times Jun. 9, 2023

I leaned down to unbuckle my boots, shouldering my pack to the ground for a final time.

From Washington Post Feb. 18, 2022

The chief claimed Solis had struck him while he was trying to pull her out of her car and she was trying to unbuckle her seat belt.

From Seattle Times Oct. 3, 2021

I unbuckle one seat belt and sit up.

From "Paper Towns" by John Green

He unbuckles his seat belt and slides out of the car when he says, “A lot of my friends are dying.”

From Seattle Times Jun. 30, 2017

For instance, autopilot mode is designed to first issue a series of warnings, and ultimately slow the car to a stop if the driver unbuckles his seat belt or gets out of his seat.

From Slate Nov. 12, 2015

Poulin unbuckles this Germanic syntax and pares away words that obscure the image: Our heart survives between hammers, just as the tongue between the teeth is still able to praise.

From Time Magazine Archive

Balekin unbuckles his belt and hands it over to the servant.

From "The Cruel Prince" by Holly Black

He unbuckles the helmet, takes it off his head, and hands it to me.

From "They Both Die at the End" by Adam Silvera

As they unbuckled, she reached up and pushed the call button.

From Seattle Times Jan. 9, 2024

He unbuckled the straps on his backpack to make it easier to wriggle out, just in case.

From Los Angeles Times Jun. 9, 2023

He unbuckled his seat belt and we both bolted from the smoking, flaming Kia, looking over our shoulders, movie-star style, to see the inevitable fireball we narrowly escaped.

From Washington Post Mar. 20, 2023

I suspect your neighbors wouldn’t leave their children unbuckled if they knew it was illegal, or if their attention had been drawn to the benefits of buckling.

From New York Times Apr. 19, 2022

Dolorous Edd helped him to his feet and unbuckled his helm.

From "A Dance with Dragons" by George R. R. Martin

Footage shows passengers on Virgin Galactic's first space tourism flight unbuckling their seatbelts and floating around, experiencing zero-gravity.

From BBC Aug. 10, 2023

A recent YouTube series, “Best Shape of My Life,” that ostensibly targeted his non-superhero dad bod was really about unbuckling his own strictures of behavior.

From New York Times Apr. 2, 2022

These insects can generate exceptionally loud sounds by rapidly buckling and unbuckling drumlike structures on their bodies called tymbals.

From Scientific American Jan. 10, 2022

Romo’s incident followed Max Scherzer’s spectacle, finding himself unbuckling his belt in the middle of an inning before an umpire felt the Washington Nationals ace’s sweaty hair for any foreign substances.

From Washington Times Jul. 6, 2021

“Wait here a sec,” he said, unbuckling his seat belt.

From "The Darkest Minds" by Alexandra Bracken

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training