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Definitions of unfasten
  1. verb
    become undone or untied
    "The shoelaces unfastened"
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  2. verb
    cause to become undone
    "unfasten your belt"
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Definition that contains unfasten
  • unhitch unfasten or release from or as if from a hitch
  • unbend unfasten, as a sail, from a spar or a stay
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