The professor had a soporific voice and I fell asleep. Here it is used as an adjective, meaning the soporific voice made me sleepy.
Assuming that you want a sentence using the word 'soporific' (definition: causing or tending to cause sleep), an example would be: 'The drug she was taking had a soporific effect'
A decongestant and a soporific are combined in cold medicine used at night.
There is no better soporific and sedative than skepticism.-Friedrich Wilhelm NietzscheBecause he had watched so many movies the night before, Joey was soporific the next day during school.
The heat from the log-fire was rather soporific, and my eyes began to feel heavy.
Both soporific and liquid ammonium can induce drowsiness or sleepiness. Soporific refers to a substance that causes sleep, while liquid ammonium, specifically ammonium hydroxide, can be harmful if inhaled and may cause drowsiness, among other health effects.
The following words are examples of "dull":boringTediousSluggishLifelessTiresomeDozyTiredDrowsyPassiveThere are a lot of words that you could use instead. See the link. (These are all adjectives describing a state of consciousness or physicality)A word meaning to make sleepy/induce sleep is soporific.
quintessential,soporific,collateral
sop·o·rif·icsop·o·rif·ic [sòppə ríffik, spə ríffik]adj1.making somebody sleepy: causing sleep or drowsiness2.feeling sleepy: experiencing sleepiness or drowsiness3.tedious: dull and boringThe book he was reading acted as a soporific and soon he was fast asleep.
Causing sleep; tending to cause sleep; soporiferous; as, the soporific virtues of opium., A medicine, drug, plant, or other agent that has the quality of inducing sleep; a narcotic.
anesthetic, anodyne, calmative, lenitive, mesmeric, mesmerizing, narcotic, opiate, sleepy, somniferous, somnolent, soothing, soporific, soporose, trance-inducing
Chloroform or Ether. ========================== Soporific Anesthetic
painkiller, narcotic, sedative, opiate, anodyne, analgesic, soporific