cut down

We can also say 'cut down on', which means to reduce something.

Habitat loss and other factors have cut down cheetah numbers and their genetic diversity in recent decades.

But I don't like it, so I want to cut down on my use of clingfilm.

Deforestation is the process of cutting down trees.

PAUL: In one case where I cut down a prisoner who'd hung himself, there is no, "Right, let's sit down, let's chat, "let's have five minutes."

Now, because he gave that information up as part of a deal that he brokered with law enforcement that was going to cut down his sentencing, he was under that arrangement for a very long time.