launder

Etymology

Contracted from Middle English lavender, from Old French lavandiere, from Late Latin lavandena, from Latin lavō (“I wash”).

noun

1. (obsolete) A washerwoman or washerman.
2. (mining) A trough used by miners to receive powdered ore from the box where it is beaten, or for carrying water to the stamps, or other apparatus for comminuting (sorting) the ore.
3. A trough or channel carrying water to the wheel of a watermill.
4. A gutter (for rainwater).

verb

1. To wash; to wash, and to smooth with a flatiron or mangle; to wash and iron.
2. (obsolete) To lave; to wet.
3. (money) To disguise the source of (ill-gotten wealth) by various means.