amphetamine
noun /æmˈfetəmiːn/,  /æmˈfetəmɪn/
  /æmˈfetəmiːn/,  /æmˈfetəmɪn/
 [countable, uncountable]- a drug that makes you feel excited and full of energy, used to treat certain medical conditions or taken illegally as a stimulant苯丙胺(中枢兴奋药);安非他明 词源1930s: abbreviation of its chemical name, a(lpha-)m(ethyl) phe(ne)t(hyl)amine.