How can I make someone understand me?

Try torture

You cannot make people do what they don't wish to do. You explain your point of view and leave it at that.

Use your tongue, hands and eyes.

Lol I mean talk.

You can't. They either do, or not.

Show them through your actions

You can't.

Set down with them over a nice meal privately.
First, hear them out, see what they have to say. Know how they receive information. Then, use their coding system to communicate yourself. In simple terms: speak their language.

You can't
But try maybe u can
And if u can tell me too how u did it

You can’t, really. You can only state your perspective. Some will never understand. Others, even if they do understand, may disagree.

You can't! don't even try! if they don't understand it's because they're 1# unable to 2# they don't want to