Antonyms of verb unpin

1 sense of unpin

Sense 1
unpin -- (remove the pins from; unfasten the pins of)
       Antonym of pin (Sense 2)
      => pin -- (attach or fasten with pins or as if with pins; "pin the needle to the shirt". "pin the blame on the innocent man")

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

1 sense of unpin

Sense 1
unpin -- (remove the pins from; unfasten the pins of)
       => undo -- (cancel, annul, or reverse an action or its effect; "I wish I could undo my actions")