Nouns

(n)dunhorse of a dull brownish grey color
(n)dun, greyish brown, grayish brown, fawna color or pigment varying around a light grey-brown color“she wore dun”

Verbs

(v)torment, rag, bedevil, crucify, dun, frustratetreat cruelly“The children tormented the stuttering teacher”
(v)dunpersistently ask for overdue payment“The grocer dunned his customers every day by telephone”
(v)duncure by salting“dun codfish”
(v)dunmake a dun color

Adjectives

(s)dunof a dull greyish brown to brownish grey color“the dun and dreary prairie”