桢干 zhēngàn backbone Definitions Defs Origin Strokes Stroke Words Sentences Sents zhēngàn backbone · core member · to support 桢 楨 zhēn mainstay (bound form) a pillar or backbone of a group or state; a core member干 幹 gàn noun trunk (bound form) the main part of something; trunk of a tree; main line or arteryzhēngàn wooden pillars 桢 楨 zhēn construction post (bound form) a wooden post used at the ends of a wall during construction干 幹 gàn noun trunk (bound form) the main part of something; trunk of a tree; main line or artery