depressant

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

a drug that reduces excitability and calms a person
• Syn:
sedative, sedative drug, downer
• Derivationally related forms:
down (for: downer), depress, sedative (for: sedative)
• Hypernyms:
medicine, medication, medicament, medicinal drug, drug of abuse, street drug
• Hyponyms:
chloral hydrate, glutethimide, Doriden, sedative-hypnotic, sedative-hypnotic drug

II - adjective

capable of depressing physiological or psychological activity or response by a chemical agent
• Ant:
stimulative
• Similar to:
ataractic, ataraxic, sedative, tranquilizing, tranquillizing,
tranquilising, tranquillising, narcotic, narcotizing, narcotising, relaxant,
soporific, soporiferous, somniferous, somnific, hypnogogic, hypnagogic
• Derivationally related forms:
depress

• Từ đồng nghĩa / Synonyms:
  sedative, sedative drug, downer