Chou Collection, Upper Volume
Radical: Mouth (kǒu)
Character: dan
Kangxi stroke count: 10
Page 192, Entry 07
Tang Rhymes (Tangyun): Pronounced xian (rising tone). Collected Rhymes (Jiyun): Pronounced xian (rising tone). Pronounced the same as the character for saliva.
Explanation of Simple and Compound Characters (Shuowen): Refers to speech mixed with sighs.
Also, Wide Rhymes (Guangyun): Pronounced tan (level tone). Collected Rhymes (Jiyun): Pronounced tan (level tone). Pronounced the same as the character for altar. The meaning is the same.
Also, Collected Rhymes (Jiyun): Pronounced yan (level tone). Dan-dan, describes the appearance of slanderous talk that is urgent.
Book of the Later Han (Hou Hanshu), Biography of Liang Hong: All are first flattering, then slanderous. Note: Dan is pronounced yan (level tone), referring to the appearance of slanderous talk that is rapid and malicious.
Also, Jade Chapters (Yupian): Pronounced dan (falling-rising tone). Collected Rhymes (Jiyun): Pronounced dan (falling-rising tone). Pronounced the same as the character for birth. See the detailed entry for the character birth under the Speech radical.