To clean with water and, typically, soap or detergent; to launder by hand rather than by washing machine.
This sign doesn't apply to "wash" as in washing machine or washing a car! Typically by hands. There are different signs depending on the sentences.
To wash (e.g. car or other vehicle, window) with water (and soap or detergent).
To wash (floor, something below you) with water (and soap or detergent).
To wash (e.g. dishes, something flat and surface).
To wash one's hair.
First 100 words.
As you feel more comfortable with the first few hundreds of ASL signs, progress further with your vocabulary and learn signing more.