乐此不疲 lè cǐ bù pí

DEFINITIONS

  1. to enjoy sth and never tire of it (idiom)

CHARACTERS

乐 lè
HSK 2
happy, glad; enjoyable; music
此 cǐ
HSK 4
this, these; in this case, then
不 bù
HSK 1
no, not; un-; negative prefix
疲 pí
HSK 5
feel tired, be exhausted; weak