In the Guangyun, it is read as liang si qie, and in the Jiyun, it is read as liang er qie, with the same pronunciation as "li". The Erya, in its "Shigu" section, explains it as meaning illness. Also, in the Guangyun, it is read as li zhi qie, and in the Jiyun, it is read as ling zhi qie, with the same pronunciation as "li". The meaning is the same.