How to write 桢

桢 楨 zhēn 〈名〉 【本义】: 木名，即女贞 [Literal meaning]: Name of wood, referring to the Ligustrum tree. 【造字法】: 形声。从木，贞声。 [Character formation]: A phonetic compound, consisting of "木" (wood) and the sound "贞". 【引】 1 《说文》：桢，刚木也。 [From "Shuowen"]: 桢 means hardwood. 2 左思《吴都赋》：文欀桢橿。 注:“桢、橿，二木名。” [From "Wudu Fu" by Zuo Si]: 文欀桢橿. Note: "桢" and "橿" are names of two types of wood. 3 《山海经》：又东二百里，曰太山，上多金玉、桢木。 [From "Shanhaijing"]: Two hundred miles to the east, there's Taishan, abundant with gold, jade, and 桢 wood. 【释义】 1 同本义 ([En.] hardwood) [Same meaning as above]: Hardwood. 2 古代筑墙时竖立在两端的木柱 ([En.] terminal posts used in building a wall in ancient times) [In ancient times, used as terminal posts erected at both ends of a wall]: Terminal posts used in ancient wall construction. 【引】 1 《尔雅》：桢，干也。 舍人注:“桢，正也。筑墙所立两木也。”按，植于两端者曰桢，植于两边者曰干。 [From "Erya"]: 桢 means post. The commentary states that "桢" means upright, referring to the two posts planted when building a wall. Namely, those planted at both ends are called 桢, while those at the sides are called 干. 2 《诗·大雅·文王》：维周之桢。 [From "Shijing"]: 它 pertains to the posts of Zhou. 【例】 又如:桢干 [For example]: 桢干. 3 支柱，主干 ([En.] mainstay; pillar) [Support; Main structure]: Mainstay or pillar. 【引】 1 峙乃桢干。——《书·费誓》传:“题曰桢。” [In "Book of Documents"]: It is indeed a 桢 post. - In the commentary: "It is referred to as 桢." 【例】 又如:桢臣(栋梁之臣);桢材(干才);桢固(支柱;骨干) [For example]: 桢臣 (a pillar of support); 桢材 (wood for main structure); 桢固 (support; backbone).