laugh 
英 [lɑːf]  美 [læf] 
n. 笑；笑声；引人发笑的事或人

v. 笑；嘲笑；使笑得；以笑表示

例句：
He was about to offer an explanation, but she was beginning to laugh. 

他正要解释，她却放声大笑起来了。

He laughed when she said he looked like his dad. 

当她说他长得像他父亲时，他大笑起来。

He laughed his derision at the play. 

他用笑声表达了他对该剧的嘲讽。

We laughed ourselves sick at the memory. 

回忆起那件往事，我们捧腹大笑。

A week ago, she'd have laughed herself stupid at the idea. 

一个星期以前，这个主意肯定会让她笑傻的。