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lunatic

noun
🔊/ˈluːnətɪk/
🔊/ˈluːnətɪk/
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  1. a person who does crazy things that are often dangerous精神错乱者；狂人 synonym maniac
    • This lunatic in a white van pulled out right in front of me!这个疯子开着一辆白色货车直接插到了我前面！🔊🔊
    Topics Dangerc2, Personal qualitiesc2
    Oxford Collocations Dictionaryadjective
    • complete
    • raving
    • crazed
    • …
    lunatic + noun
    • asylum
    See full entry
  2. (old-fashioned) a person who is severely mentally ill (the use of this word is now offensive)严重精神病患者，疯子（现为冒犯语）
    Oxford Collocations Dictionaryadjective
    • complete
    • raving
    • crazed
    • …
    lunatic + noun
    • asylum
    See full entry
    3. Word OriginOriginally from the Latin lunaticus (luna = moon), because people believed that the changes in the moon made people go mad temporarily.

lunatic

adjective
🔊/ˈluːnətɪk/
🔊/ˈluːnətɪk/
Idioms
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  1. crazy, silly or extremely stupid疯狂的；荒唐可笑的；极其愚蠢的
    • lunatic ideas荒谬的想法
    • a lunatic smile傻笑
Idioms
the lunatic fringe noun
  1. [singular + singular or plural verb] (disapproving) those members of a political or other group whose views are considered to be very extreme and crazy极端分子；极端（或狂热）分子集团
    • They stressed that only the lunatic fringe of the movement was involved in the incident.他们强调，该事件只涉及运动的疯子边缘。