This idiom or expression has to do with:

Accepting.
Understanding and accepting a somewhat difficult situation.

It’s not easy, but I've been trying to come to terms with my father’s past.

Also:
Come to grips.

This idiom or expression like phrase means:

In agreement with.

I’m definitely in tune with my wife’s feelings. We talk about everything.

This idiom or expression has to do with:

Having understanding.
Feeling and understanding other people’s pain.

This idiom or expression has to do with:

Finding a solution.
Understanding something.
Understanding how something works.

This idiom or expression has to do with:

Understanding someone.

When someone says “I can’t read Mr. Hashimoto,” they mean something like:

I don’t understand his way of thinking.
I don’t know (can’t tell) what he’s thinking about. Etc.

This idiom or expression means:

Understanding it.
Understanding the situation.

A. I’ve been telling you about my problems, but you don’t get it.
B. Of course I get it. You don’t have any money!!

Also:
Getting the idea.
Getting the picture.
Getting the jest of it.