Study the information about phrasal verbs + up.
1. Bring up a topic = introduce it in a conversation

Come up = be introduced in a conversation

Come up with an idea = produce an idea

Make something up = invent something that is not true
Some interesting matters came up in our discussion yesterday.

I don’t want to hear any more about this matter. Please don’t bring it up again.
2. Cheer up = be happier

Save up = save money to buy something

Clear up = become bright (for weather)
Dan is saving up for a trip round the world.
3. Blow up = explode

Blow something up = destroy it with a bomb

Tear something up = tear it into pieces

Beat somebody up = hit someone repeatedly, so that they are badly hurt
I didn’t read the letter. I just tore it up and threw it away.
4. Break up/split up = separate

Do up a coat = fasten, tie

Do up a building, a room= repair and improve it

Look something up in a dictionary

Put up with something = tolerate it

Hold up a person, a plan =delay

Mix up people/things, get people/things mixed up = you think one is the other.
The two brothers look similar. Many people mix them up.

The kitchen looks great now that it has been done up.