lunatic

Từ điển Oxford Advanced Learner 8th

lu·na·tic [lunatic lunatics] noun, adjective BrE [ˈluːnətɪk] NAmE [ˈluːnətɪk]
noun
1. a person who does crazy things that are often dangerous
Syn: ↑maniac
•This lunatic in a white van pulled out right in front of me!
2. (old-fashioned)a person who is severely mentally ill (the use of this word is now offensive) Originally from the Latin lunaticus (luna = moon), because people believed that the changes in the moon made people go mad temporarily.
Idiom: ↑lunatic fringe
 
adjective
crazy, ridiculous or extremely stupid
•lunatic ideas
•a lunatic smile
 

• Từ đồng nghĩa / Synonyms:
  moonstruck, daredevil, madcap, hothead, swashbuckler, harum-scarum, madman, maniac