6. (foll by: to) related (to) or dependent (on). 7. (when: postpositive, often foll by to) having a subsidiary or minor relationship (with). 8. (General Physics) (esp of a beam of light or particles) arriving at or striking a surface: incident electrons.
Answers (1) hill. Personally, if you use salt water properly, it won't cause any damages to your sunglasses. But if you rinse your sunglasses in salt water for a long time, it may cause some damages to the lens coating of your sunglasses. Anyway, you needn't rinse your sunglasses in salt water.
When you have hard water, your dishes can come out of the dishwasher looking worse than when they went in. Hard water leaves your glasses cloudy or spotted, and can even prevent your dishes from getting as clean as they should. Of course, some dishwashers are better at handling hard water than others.