уменьшаться in English:

to decrease the risk

You drink too much coffee. You should cut back.

Several schools will have to close due to the government's decision to cut back on spending on education.

They had to cut back the factory's workforce.

The Chancellor of the Exchequer tried to cut back spending in his budget by increasing taxation on consumer goods. I've felt a lot better since I cut back smoking.

If exercise is causing you pain, you should cut back.