unstrap
un strap |ˌənˈstrap ənˈstræp | ▶verb ( unstraps, unstrapping, unstrapped ) [ with obj. ] undo the strap or straps of. • release (someone or something ) by undoing straps: they unstrapped themselves.
un |strap |ʌnˈstrap | ▶verb ( unstraps, unstrapping, unstrapped ) [ with obj. ] undo the strap or straps of: she unstrapped the harness. • release (someone or something ) by undoing straps: they unstrapped themselves.