to write away for' something means to send a letter or form asking for something.
- I want a free copy so I'll write away for one.
- She has written away for a brochure with details of the course.
'to write back' means to reply.
- I sent him a letter but he didn't write back.
- I wrote back saying that we would be happy to accept their invitation.
'to write down' means to record something on paper.
- So I don’t forget, can you write that down, please?
- I wrote down his phone number on a piece of paper but I can't find it now.
'to write in' to an organisation means to send a letter to them.
- To give us your comments on today's show, write in to the usual address.
- The first one hundred people who write in will receive a free copy.
'to write off' means that you decide someone or something is unimportant or not to be considered further.
- Children who are not academic are often written off by schools instead of being helped.
- Most companies write off any employee over fifty-five as they assume they are profitable.
'to write off' a car means to crash it so that it cannot be repaired.
- She has had only one accident but she did write the car off.
- There really isn't much damage to the car. It won't be written off by the insurance.
'to write off' a debt means to cancel it.
- The rich countries in the West should write off the debts of the Third World.
- We had to write off quite a lot of bad debts at the end of the year.
'to write out' means to note all the necessary information on a cheque or prescription.
- Can you write me out a receipt for my accounts, please?
- The doctor wrote out a prescription for the drugs and handed it to me.
'to write up' your notes means to record them on paper in a neat form.
- After every class, I always write up my notes straight away.
- She wrote up the minutes of the meeting and distributed them the next day.
'to write up' means to note something on a notice or board on a wall.
- The teacher wrote her name up on the board.
- If you want to join, just write your name up on the notice board.