sedative
US /ˈsed.ə.t̬ɪv/
UK /ˈsed.ə.t̬ɪv/
1.
a drug taken for its calming or sleep-inducing effect
:
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The doctor prescribed a mild sedative to help her sleep.
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He was given a strong sedative before the surgery.
1.
having a calming or sleep-inducing effect
:
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The warm milk had a sedative effect on the child.
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The quiet music created a sedative atmosphere.