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unfasten

1 ENTRIES FOUND:
unfasten /ˌʌnˈfæsn̩/ Brit /ˌʌnˈfɑːsən/ verb
unfastens; unfastened; unfastening
unfasten
/ˌʌnˈfæsn̩/ Brit /ˌʌnˈfɑːsən/
verb
unfastens; unfastened; unfastening
Britannica Dictionary definition of UNFASTEN
[+ object]
: to make (something) loose : undo