dun

horse of a dull brownish grey color

a color or pigment varying around a light grey-brown color; "she wore dun"

treat cruelly; "The children tormented the stuttering teacher"

persistently ask for overdue payment; "The grocer dunned his customers every day by telephone"

cure by salting; "dun codfish"

make a dun color

of a dull greyish brown to brownish grey color; "the dun and dreary prairie"