[laun.der] vb laun.dered ; laun.der.ing [ME launder, n.] vt (1664) 1: to wash (as clothes) in water
2: to make ready for use by washing and ironing "a freshly ~ed shirt"
3: to transfer (as illegally obtained money or investments) through an outside party to conceal the true source ~ vi: to wash or wash and iron clothing or household linens -- laun.der.er n
[2]launder n [ME, launderer, fr. MF lavandier, fr. ML lavandarius, fr. L lavandus, gerundive of lavare to wash--more at lye] (1667): trough; esp: a box conduit conveying particulate material suspended in water in ore dressing