unbuckle
verb
un·buck·le ˌən-ˈbə-kəl 
unbuckled; unbuckling
transitive verb
: to loose the buckle of : unfasten
intransitive verb
1
: to loosen buckles
2
: relax
Example Sentences
She unbuckled her seat belt.
Recent Examples on the Web Every summer, locals unbuckle their belts for a smorgasbord of dine-out promotions, tantalizing with months of slick deals at high-end and lower-end restaurants. 
Phillip Valys, Sun Sentinel, 2 Sep. 2022 The mother told investigators the child knows how to unbuckle himself and get out of the car. Fox News, 21 June 2022 Gonzalez also said that the child has the ability to unbuckle himself, but said the mother was using a loaner car. Adam Sabes, Fox News, 24 June 2022 After the interview, Yahritza, Jairo and Mando unbuckle their black carrying cases to reveal their instruments. Los Angeles Times, 26 Apr. 2022 Once there, passengers and crew can unbuckle themselves to experience weightlessness for about three minutes before returning back to their home planet. Algernon D'ammassa, USA TODAY, 10 July 2021 The home plate umpire approached Megill and asked him to hand over his glove and hat and unbuckle his belt. Eric Levenson, CNN, 24 June 2021 The headroom is considerable, with ample space above the couches in which to unbuckle and float during the brief weightless portion of the trip. Jeffrey Kluger, Time, 7 June 2021 The experience will last about 11 minutes, during which the capsule will pass the Karman Line and the astronauts will be able to unbuckle their seatbelts and float in zero gravity for about three minutes. Meredith Deliso, ABC News, 12 June 2021 See More
Phillip Valys, Sun Sentinel, 2 Sep. 2022 The mother told investigators the child knows how to unbuckle himself and get out of the car. Fox News, 21 June 2022 Gonzalez also said that the child has the ability to unbuckle himself, but said the mother was using a loaner car. Adam Sabes, Fox News, 24 June 2022 After the interview, Yahritza, Jairo and Mando unbuckle their black carrying cases to reveal their instruments. Los Angeles Times, 26 Apr. 2022 Once there, passengers and crew can unbuckle themselves to experience weightlessness for about three minutes before returning back to their home planet. Algernon D'ammassa, USA TODAY, 10 July 2021 The home plate umpire approached Megill and asked him to hand over his glove and hat and unbuckle his belt. Eric Levenson, CNN, 24 June 2021 The headroom is considerable, with ample space above the couches in which to unbuckle and float during the brief weightless portion of the trip. Jeffrey Kluger, Time, 7 June 2021 The experience will last about 11 minutes, during which the capsule will pass the Karman Line and the astronauts will be able to unbuckle their seatbelts and float in zero gravity for about three minutes. Meredith Deliso, ABC News, 12 June 2021 See More Word History
First Known Use
14th century, in the meaning defined at transitive sense
Kids Definition
unbuckle
verb
un·buck·le ˌən-ˈbə-kəl
unbuckled; unbuckling
: to unfasten the buckle of (as a belt)