Chou Collection, Upper Volume
Radical: Mouth (kǒu)
Character: 唾
Kangxi Strokes: 11
Page 194, Entry 14
Pronounced tuo (falling tone).
According to the Explanation of Writing (Shuowen), it refers to saliva.
Book of Rites (Liji), Record of Customary Propriety: Do not spit when offering food.
Also, Record of Internal Affairs (Neize): Do not dare to spit or discharge nasal mucus.
Zuo Tradition (Zuozhuan), 33rd Year of Duke Xi: He turned around and spat without looking back.
The Explanation of Writing (Shuowen) states that the original character was written as a variant. It is sometimes written as the variant form (tuo).
Comprehensive Rhymes (Guangyun) writes it as the variant form (tuo).
The variant form (tuo) is written with the water radical.
Textual research note: In the Zuo Tradition (Zuozhuan), 33rd Year of Duke Xi, the text has been corrected from the original 23rd year to the 33rd year.