unsnap, untie, unlock; see unhitch.
"unfasten." YourDictionary, n.d. Web. 05 December 2018. <https://thesaurus.yourdictionary.com/unfasten>.
unfasten. (n.d.). Retrieved December 05th, 2018, from https://thesaurus.yourdictionary.com/unfasten
To free from ties or fasteners:
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