flatten [ˈflætn]

以下由轻松背单词网站提供

vt.&vi.把．．．弄平，使倒伏；使(漆等)失去光泽

to become level or cause something to become level

We can flatten out a piece of metal by hammering it. 我们可以用锤子把一块金属敲平。
The wrinkled silk will flatten out if you iron it. 发皱的丝绸可以用熨斗烫平。