noun
a drug containing opium or its derivatives, used in medicine for inducing sleep and relieving pain
adjective
relating to or resembling opium
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The doctor prescribed an opiate to manage the patient's pain.
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I heard that opiate is really strong stuff, be careful with it.
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Some people abuse opiates to get high.
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Music is like an opiate for the soul, it can soothe and heal in ways nothing else can.