(n.) Something that produces a loss of feeling or sensation; as an anesthetic given before an operation\

Mickey Finn Pentothal alleviating alleviative analgesic anodyne assuasive balmy balsamic benumbing cathartic chloroform cleansing cocaine deadening demulcent dope drug dull dulling easing emollient ether ethyl chloride ethylene gas hard hypnotic impassible impenetrable impermeable impervious insensate insensitive knockout drop lenitive lullaby mandrake menthol mitigating mitigative morphia morphine narcotic nightcap nitrous oxide numbing obtuse opiate opium pain-killer pain-killing palliative poppy purgative relieving remedial rocky sedative sleep-bringer sleep-inducer sleep-producer sleeping pill softening somnifacient soothing soporific stunning stupefying subduing tranquilizer