gaiety
noun /ˈɡeɪəti/
  /ˈɡeɪəti/
[uncountable] (old-fashioned)- the state of being cheerful and full of fun快乐;愉快;高兴 - The colourful flags added to the gaiety of the occasion.彩旗增添了盛会的欢乐气氛。 
 词源mid 17th cent.: from French gaieté, from gai, of unknown origin.
- The colourful flags added to the gaiety of the occasion.