That information is completely unnecessary.

He thinks that war is a necessary evil.

I live with the minimum amount of things.

In order to solve this problem, it is necessary to minimize the loss.

We are striving to minimize costs.

That unsolved problem keeps him awake at night.

That unsolved case keeps him awake at night.

They learned about the least common multiple in math class.

The process of name resolution is very important in computer networks.

No problem, I will do that job.