unfurl
verb [ I or T ] uk/ʌnˈfɜːl/ us/ʌnˈfɝːl/
（使）（旗帜、船帆、横幅等卷着的东西）展开
If a flag, sail, or banner unfurls, it becomes open from a rolled position, and if you unfurl a flag, etc., you make it do this
The demonstrators unfurled a large banner. 示威人群打出了一条大大的横幅。
Synonym: unfold (OPEN)
Opposites: fold (BEND)furl