IPA: /ˈlɔːndərər/
KK: /ˈlɔndərər/
A person whose job is to wash and clean clothes and other fabrics.
The launderer carefully pressed the shirts before returning them to the customers.
Launderer → It is formed from "launder" (from Old French *laver*, meaning to wash) and "-er" (meaning a person who). A launderer is a person who washes or cleans clothes.
Think of someone who 'washes' ('launder') clothes — the '-er' just means a person. A launderer is someone who cleans clothes.