washtub; dishpan; washing-up bowl
A tub or basin used for washing clothes, dishes, or other items. Common in traditional Japanese households.
My grandmother washed the vegetables in a washtub.
I fill the dishpan with water and soak the dishes.
Compound of 洗い (arai, 'washing', the continuative form of 洗う arau 'to wash') and 桶 (oke, 'tub, bucket').