What is another word for "dull"?

Roget's Thesaurus (1911) lists these synonyms for "dull": abeyance, adder, agent, anaesthesia, anaesthetic, anaesthetize, and, bald, beetle, benumb, bland, blanket, bluff, blunt, bluntness, book, boring, callous, careless, case, caught, childish, chloral, chloroform, close, cold, colorless, coma, comatose, commonplace, conte, damp, dead, deadly, deaf, deaf-mute, deafen, deafness, dearth, depress.