un·couth / ˌənˈkoō[unvoicedth]/ • adj. (of a person or their appearance or behavior) lacking good manners, refinement, or grace: he is unwashed, uncouth, and drunk most of the time. ∎ (esp. of art or language) lacking sophistication or delicacy: uncouth sketches of peasants. ∎ archaic (of a place) uncomfortable, esp. because of remoteness or poor conditions.DERIVATIVES: un·couth·ly adv.un·couth·ness n.