narcotic

Adjective
  1. Of or relating to or designating narcotics (synset 302874393)
    "narcotic addicts"; "narcotic stupor"
  2. Inducing stupor or narcosis (synset 302316520)
    "narcotic drugs"
  3. Inducing mental lethargy (synset 301349046)
    "a narcotic speech"
Noun
  1. A drug that produces numbness or stupor;
    Often taken for pleasure or to reduce pain;
    Extensive use can lead to addiction (synset 103814104)

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