slough, n. [quagmire], [bog], [morass]; swale; exuviae.
sloughing, n. ecdysis, exuviation.
slovenly, a. [untidy], [disorderly], [frowzy], [careless].
slow, a. [deliberate], [moderate], gradual; dilatory, [languid], unready, [phlegmatic], [lingering], [torpid], [sluggish], [slack], leisurely; (Colloq.) wearisome, [dull], prosaic, uninteresting, [tiresome].
slow, v. [slacken], [relax], [moderate], [delay], [retard].
sluggish, a. [idle], [lazy], [slothful]; [inactive], [slow], inert.
slump, n. (Colloq.) depreciation.
slur, v. [soil], sully; [disparage], traduce, asperse; [blur], mackle.
slur, n. [stain], [mark]; innuendo, [reproach], [brand].
slush, n. [slosh], sludge.