To rack points up is to collect them.
- Indian contingent managed to rack up only six gold medals at the Asian Games.
To rake something up is to remind somebody of unpleasant things in the past.
- I don’t want to rake up the past.
To rattle on is to talk about something continuously in a boring way. The phrasal verb ‘rabbit on’ has very similar meanings.
- When she started rattling on about her illnesses, we all went to our rooms.
To ring off is to end a phone conversation.
- She rang off when he walked into the room.
To ring somebody up is to phone them.
- I will ring him up to see if he is coming.
To rip somebody off is to charge them too much money.
- I can’t believe that you paid $400 for that used laptop. You have been ripped off.
To round something off is to change a figure into the nearest whole number. You can, for example, round off 9.6 to 10.
To round off a party is to bring it to a nice end.
- We rounded off the party with a drink.
To rub it in is to keep talking about something that would make another person feel bad.
- I know I made a mistake, but you don’t have to rub it in my face.
To rule something out is to exclude it.
- James’s family alleged that he had been killed. The police, however, ruled out that possibility.