tranquilizer

/ˈtræŋkwəlaɪzər/
noun
  1. A drug used to calm a person or animal, reduce anxiety, or induce sleep.
    • The doctor prescribed a mild tranquilizer to help with her anxiety.
    • The veterinarian loaded a dart with a tranquilizer to sedate the bear.
    • He took a tranquilizer before the flight to calm his nerves.
Antonyms
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