一门心思 yī mén xīn si

DEFINITIONS

  1. to set one's heart on sth (idiom)

CHARACTERS

一 yī
HSK 1
one; a, an; alone
门 mén
HSK 2
gate, door, entrance, opening
心 xīn
HSK 3
heart; mind, intelligence; soul
思 si
HSK 2
think, consider, ponder; final particle