1. narrow down - When you narrow down the choices, you reduce their number by eliminating the others.
2. hand down - When you hand down a story, you pass it to the next generation.
3. wear down - Actions and circumstances that wear you down make you weaker because of the constant pressure.
4. live down - If it's difficult for you to live down something you did wrong, it means people won't forget it.
5. play down - When you try to play down an incident, you try to make it appear less important than it is.
6. settle down - If you have had a life where things kept changing and then settle down, you live a life of stability and routine.
7. pelt down - Normally you wouldn't want rain to pelt down as it would come down very heavily.
8. crack down - When the police crack down, they enforce rules very strictly.
9. tie down - If circumstances tie you down, they limit your freedom.
10. track down - If you finally track down something you've been looking for, you find it after a lot of difficulty.
11. tumble down - When tins etc tumble down, they fall down in disorder.
12. water down - You water down a speech to make it weaker and less controversial.
13. wave down - When you wave down someone driving past, you signal them to stop.
14. climb down - If people have an opinion about something and then climb down, they admit that they were wrong.
15. jot down - When you jot down information, you make a quick note of it.