Answer:
1. to bend ==> refract
2. not allowing light to pass through ==> opaque
3. only partially clear ==> translucent
4. clear ==> transparent
Step-by-step explanation:
1. to bend ==> refract
When a substance (like water) or a surface (like a mirror) changes the direction of the light, it refracts it.
2. not allowing light to pass through ==> opaque
Usually a solid but also a thick/dark liquid can be an opaque barrier preventing the passage of light.
3. only partially clear ==> translucent
Think about a white plastic or a film-coated glass pane, they will let you see there's light on the other side, but not letting it pass through completely.
4. clear ==> transparent
Think like a window or a anything similar that allows the light to pass through without any significant obstruction.