主心骨 Traditional form: 主心骨 Pinyin (reading): zhǔxīngǔ Definitions: backbone mainstay pillar definite view one's own judgment Characters: 主 - to own; to host; master; host; lord 心 - heart; mind; soul 骨 - bone; skeleton; frame, framework Traditional characters: 主 - to own; to host; master; host; lord 心 - heart; mind; soul 骨 - bone; skeleton; frame, framework