joviality

名词 joviality:

1. feeling jolly and jovial and full of good humor
   同义词：jollity, jolliness
2. a jovial nature
   同义词：conviviality

1. His air of joviality was put on for the occasion; by nature he was a rather reserved and serious person.
   他那欢乐活泼的外表只是一时装出来的，就他本性来看，他是个含蓄、严肃的人。