Chou Collection, Upper Volume Radical: Mouth (kǒu) 16 strokes Page 178, Entry 06 Collected Rhymes (Jiyun): Pronounced tun. Jade Chapters (Yupian): Tun-tun, meaning incomplete. Collected Rhymes (Jiyun): Tun-tun, refers to speech that is unclear. Additionally, in Broad Rhymes (Guangyun): Pronounced tun (rising tone); in Collected Rhymes (Jiyun): Pronounced tun (rising tone). The meaning is the same. Additionally, in Broad Rhymes (Guangyun): Refers to breath colliding with itself.