[汗牛充栋 / 汗牛充棟, hàn niú chōng dòngㄏㄢˋ ㄋㄧㄡˊ ㄔㄨㄥ ㄉㄨㄥˋ] lit. enough books to make a pack-ox sweat or to fill a house to the rafters (成语 saw); fig. many books#95529
[さん, san] (n) (1) (abbr) sheathing (under thatched roofing); (2) lath (used as a foundation for a mud plaster wall); (3) (See 桟竹) decorative rafters (of alternating wood and bamboo)