Zheng-yun (Zhengyun) pronounced zuo he qie, same sound as "cuo". Shuowen Jiezi (Shuowen Jiezi) explains it as: a tiger that is not gentle or honest. Yutian (Yutian) pronounced zuo gu qie. Refers to a living tiger. Jiyun (Jiyun) is written as "虘".