washtub
/ˈwɒzwæb/ WAZ-wab
Definitions
1. noun
A large container, typically made of metal or plastic, used for washing dirty laundry.
“She filled the washtub with hot water and detergent to wash the clothes.”
2. verb
To wash something, especially laundry, in a washtub.
“She washtubbed the dirty clothes in the backyard.”