adj. 钝的;迟钝的;无趣的;呆滞的;阴暗的
vt. 使迟钝;使阴暗;缓和
vi. 减少;变迟钝
n. (Dull)人名;(罗、匈)杜尔;(柬)杜;(英)达尔
dull 沉闷的
PIE*dheu, 烟尘,烟雾,词源同dust, deaf, dumb.
dull. (8) Not exhilarating; not delightful; as to make dictionaries is dull work. [Johnson]Dullsville, slang for "town where nothing happens," attested from 1960.