fold up
1．end in failure ；go bankrupt ；close up以失败而告终；破产；倒闭；停止营业
The business folded up．买卖失败了。
In an economic crisis， smaller enterprises are usually among the first to fold up．小的企业在经济危机中往往最先倒闭。
Most of his amibitious schemes folded up on him．他的野心勃勃的计划大部分都玻产了。
The new restaurant folded up in less than a year．这家新开的饭馆不到一年就关门了。
2． suffer moral or spiritual collapse 垮掉；精神崩溃
She didn't fold up when her only son died． She kept on working even harder．当她的独生子死去时，她并没有精神崩溃，相反更加努力地继续工作。
He folded up when the prosecutor discredited his story．当检察官不相信他的陈述时，他精神崩溃了。
3．collapse with mirth or pain（因高兴或疼痛）坍下来（笑得要命，痛得要命等）
From the moment the clown appeared on stage，the audience folded up in their seats．这个小丑一上场，观众们就坐在椅子上笑得前俯后仰。
The pain in her stomach was so sharp that she folded up．她的胃疼得她连腰都直不起来了。
He folded up with laughter．他笑弯了腰。
3．make smaller by folding叠小
She folded up the papers．她叠起了报纸。
Fold up your clothes tidily，please．请把你的衣服叠整齐。
Would you fold up the garden chairs and put them in the storeroom？你能把花房里的折叠椅叠起来放入储藏室去吗？
4．collapse ；break down坍塌；倒塌
He sat down on the chair， but it suddenly folded up under him．他往椅子上一坐，但是突然那椅倒塌下来了。
The table folded up under the heavy weight．这张桌子因上面放的东西太重而倒塌了。