Bolt

I learned that bolt means you use a bolt to keep metal together, I can bolt across the grass, a big bolt of  lightning struck my house, when I was using my crossbow the arrow I was using was a bolt. It can also mean that when I fell of my horse the horse bolted across the grass. 

Procrastinate

I leaned that procrastinate means that your mum or dad wants you to do some thing. But you don't do it so you put it off and do it soon.