IPA: /ˈwɒʃərmən/
KK: /ˈwɑːʃərmən/
A man who cleans clothes and other fabrics for money.
The washerman delivered the freshly cleaned clothes to my house.
Washerman → It is formed from "wash" (from Old English *wascan*, meaning to cleanse or make clean) and "-er" (meaning a person who). A washerman is a person who washes clothes or linens.
Think of someone who 'cleanses' ('wash') items — the '-er' just means a person. A washerman is someone who cleans clothes.