Reuse means to use something again. For example, portable water bottles are made to be reusable.
You ride something when you sit on or in it and it takes you places, or does something interesting. Usually you ride a bike or a horse to go somewhere, and you ride something like a Ferris wheel or other fairground ride for fun.
Rip is another word for tear, where you damage something by pulling it in two different directions at once until it breaks.
Risk is a measure of the chance of something going wrong, and what bad things will happen if it goes wrong. For example, you have a higher risk of having a heart attack as you get older and fatter.
Risk is also exposing yourself to the possibility of something bad happening, for example the man in the picture is risking falling off the ladder by standing too high on it to hang his wares.











