[suds] n pl but sing or pl in constr [prob. fr. MD sudse marsh; akin to OE seothan to seethe--more at seethe] (1581) 1: water impregnated with soap or a synthetic detergent compound and worked up into froth; also: the lather or froth on such water
2. a: foam, froth b: beer -- suds.less adj
[2]suds vt (1834): to wash in suds ~ vi: to form suds