Mao Collection, Upper Volume
Radical: Heart (xīn)
Character: Tu
Kangxi strokes: 11
Page 386, Entry 30
Broad Rhymes (Guangyun): Pronounced tu. Collected Rhymes (Jiyun): Pronounced tu.
Broad Refinement (Guangya): The appearance of harboring sorrow.
Collected Rhymes (Jiyun): Tan-tu. The uncertainty of fortune and misfortune.
Book of the Later Han (Houhanshu), Xianzhi Fu: In the end, apprehensive and filled with doubt.
Also, Collected Rhymes (Jiyun): Pronounced tu. Bitter sorrow.
Also, Collected Rhymes (Jiyun): Pronounced yu. Joy.
Also, Broad Rhymes (Guangyun): Pronounced xu. Collected Rhymes (Jiyun): Pronounced xu. Sorrow. Sometimes written as a variant form (lü).
Also, Collected Rhymes (Jiyun) and Classified Anthology (Leipian): Pronounced yu. The meaning is the same.