汗牛充栋 hàn niú chōng dòng

DEFINITIONS

  1. lit. enough books to make a pack-ox sweat or to fill a house to the rafters (idiom); fig. many books

CHARACTERS

汗 hàn
HSK 4
perspiration, sweat
牛 niú
HSK 2
cow, ox, bull; KangXi radical93
充 chōng
HSK 5
fill, be full, supply
栋 dòng
HSK 6
main beams supporting house