risk
Risk can be a noun or a verb.
used as a noun
If there is a risk of something unpleasant, there is a possibility that it will happen.
There is very little risk of infection.
The law allows police to stop people if they believe there is a serious risk of violence.
used as a verb
If someone risks doing something, it may happen as a result of something else they do.
He risked breaking his leg when he jumped.
You can also say that someone risks doing something when they do it even though they know it might have unpleasant consequences.
If you have an expensive rug, don't risk washing it yourself.
Be careful
Don't say that someone ‘risks to do’ something.
Don't say that someone ‘risks to do’ something.