IPA: /ˈwaɪtˌwɔːʃər/
KK: /ˈhwaɪtˌwɔʃər/
A person or thing that applies a whitewash, which is a type of paint made from lime and water, often used to cover walls or surfaces.
The whitewasher worked diligently to refresh the old barn's exterior.
Whitewasher → It is formed from "white" (from Old English "hwita", meaning bright or light in color) and "-washer" (from the verb "wash", meaning to cleanse or make clean). The word "whitewasher" refers to someone who applies a white wash or paint, often to cover up flaws or imperfections.
Think of someone making something 'bright' or 'clean' — 'white' means bright in color, and '-washer' refers to the act of cleansing.