causing sleepthe soporific effects of alcohol
a drug that causes sleep
It is said that the effect of eating too much lettuce is `soporific' – The Tale of the Flopsy Bunnies]
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in the sense of anaesthetic
a substance that causes anaesthesiaThe operation is carried out under general anaesthetic.
in the sense of hypnotic
of or producing hypnosis or sleepThe hypnotic state lies between being awake and being asleep.
in the sense of narcotic
a drug, such as opium or morphine, that produces numbness and drowsiness, used medicinally but addictiveHe appears to be under the influence of some sort of narcotic.
soporific 的词库—— 柯林斯 英语词库