何 - hé -  what/how   

任何 - rènhé – any / at all

我跟他没有任何关系 - wǒ gēn tā méiyǒu rènhé guānxi

I have no relations with him at all

这件事很简单任何人都能做 - zhèjiàn shì hěn jiǎndān rènhé rén doū néng zuò

This matter is very simple, anyone can do it

如何 - rúhé - how

如何解决这个问题？- rúhé jiějué zhège wèntí ？ 

How to solve this problem?

后来我才学会了如何去爱 - hòulái wǒ cái xuéhuìle rúhé qù ài

First afterward I learned how to love

合 - hé -  join/combine

适合 - shìhé - to fit/suit 

我太懒了，我不适合这样的工作 - wǒ tài lǎnle ， wǒ bù shìhé zhèyàngde gōngzuò

I am too lazy, I don’t fit this kind of work

我很喜欢说话，我很适合做个老师 - wǒ hěn xǐhuān shuōhuà ， wǒ hěn shìhé zuò ge lǎoshī 

I really like to talk, I would fit being a teacher

合作 - hézuò - cooperate

我不要跟他们合作 - wǒ bùyào gēn tāmen hézuò 

I don’t want to cooperate with them

我们都合作得很愉快 - wǒmén doū hé zuòde hěn yú kuài 

We cooperate very well