somniferous

tending to cause sleep a somniferous enumeration of details that I could have done without Synonyms drowsy, narcotic, opiate, sleepy, slumberous (or slumbrous), hypnotic, somnolent, soporificRelated Words depressant, relaxant, sedative, tranquilizing (also tranquillizing); calming, comforting, lulling, pacifying, quieting, relaxing, restful, settling, soothing; analgesic, anesthetic, anesthetizing, benumbing, deadening, dulling, numbing; hypnotizing, mesmerizing, stupefyingNear Antonyms arousing, awakening, energizing, invigorating, rousing, stimulating, wakening, waking; bracing, refreshing, restorative, reviving, stimulative, stimulatoryAntonyms stimulant