单词：hard_drug 

名词

• 
  [1.n.hard_drug] (同义词:[hard_drug([口](会在生理和心理上)致瘾的麻醉品 )]  )
• 
  注释列句：a narcotic that is considered relatively strong and likely to cause addiction
• 上位词 -> [narcotic( n. 麻醉药, 致幻毒品, 镇静剂 adj. 麻醉的, 催眠的 )]  [drug( n. 药, 麻药, 麻醉药, 滞销货 vi. <俗> 吸毒 vt. 使服毒品, 毒化 )]  [agent( n. 代理(商) )]  [causal_agent]  [physical_entity]  [entity( n. 实体 )] 
• 下位词 -> [cocaine( n. 古柯碱,可卡因 )]  [heroin( n. 海洛因, 吗啡 )] 
  反义词 -> [soft_drug]