noun
wiper
WY-per/ˈwaɪpər/
A person or implement that wipes a surface.
The wiper clears rain from the windshield with each sweep.

Etymology
The pieces mean a person or thing that wipes. The word first named a drying worker, then a wiping cloth; the selected device sense is shortened from “windshield-wiper.”
In context
if you've ever driven your car at night in the rain, you will actually notice there's a haze on your windshield every time the wiper passes over it.
More examples
- She replaces the worn wipers before the rainy season.
- Use a clean wiper to remove oil from the metal.
- A rubber wiper removes water from the shower glass.
Forms
wiper · wipers
wipe verb — Remove dirt or moisture by rubbing.