Antonyms of verb unbuckle

1 sense of unbuckle

Sense 1
unbuckle -- (undo the buckle of; "Unbuckle your seat belt")
       Antonym of buckle (Sense 1)
      => buckle, clasp -- (fasten with a buckle or buckles)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb unbuckle

1 sense of unbuckle

Sense 1
unbuckle -- (undo the buckle of; "Unbuckle your seat belt")
       => undo -- (cancel, annul, or reverse an action or its effect; "I wish I could undo my actions")