unroll
verb [ I or T ] uk/ʌnˈrəʊl/ us/ʌnˈroʊl/
（使）铺开;（使）展开
to open and become flat from a rolled position, or to cause something to do this
She unrolled the most beautiful carpet. 她展开了这块精美绝伦的地毯。
Synonym: unfurl
Opposite: roll something up