adj. 1 (of a person, manners, appearance, etc.) lacking in ease and polish; uncultured, rough (uncouth voices; behaviour was uncouth). 2 archaic not known; desolate; wild; uncivilized (an uncouth place). uncouthly adv. uncouthness n.
[ OE uncuth unknown (as UN-(1) + cuth past part. of cunnan know, CAN(1)) ]