不亦乐乎 bù yì lè hū

DEFINITIONS

  1. lit. isn't that a joy? (quote from Confucius)
  2. fig. (jocularly) extremely
  3. awfully

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
亦 yì
HSK 6
also, too; likewise
乐 lè
HSK 2
happy, glad; enjoyable; music
乎 hū
HSK 3
interrogative or exclamatory final particle