dormitive
Speech parts
1. dormitive - Noun
2. dormitive - Adjective
Meaning
Causing sleep; as, the dormitive properties of opium.
A medicine to promote sleep; a soporific; an opiate.
Source: Webster's dictionarySynonyms
downer
narcotic
hypnotic
sedative
opiate
depressant
soporific
anodyne
somnolent
dope
tranquilizer
sleeping pill
opium
sleeping draught
sleeping tablet
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Antonyms
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Why Opium produces sleep: ... Because there is in it a dormitive power.