unbuckle - definition and synonyms

verb [transitive] 

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/ʌnˈbʌk(ə)l/
present tense
I/you/we/theyunbuckle
he/she/itunbuckles
present participleunbuckling
past tenseunbuckled
past participleunbuckled
  1. to make the buckle on something such as a belt loose before taking it off