Search the dictionary A Chinese word or character, or English Search 2 entries. sìkù 四库 the four book depositories, namely: classics 經|经, history 史, philosophy 子[zi3], belles-lettres 集 sìkù 四庫 the four book depositories, namely: classics 經|经, history 史, philosophy 子[zi3], belles-lettres 集