樂不思蜀 lè bù sī shǔ

DEFINITIONS

  1. indulge in pleasure and forget home and duty (idiom)

CHARACTERS

樂 lè happy, glad; enjoyable; music
不 bù
HSK 1
no, not; un-; negative prefix
思 sī
HSK 2
think, consider, ponder; final particle
蜀 shǔ name of an ancient state