Zi Collection, Upper Volume, Page 10, Entry 02 Radical: Mouth (kǒu) Pronounced hu (falling tone) Pronounced xu (rising tone) Same pronunciation as "xi" (rising tone). Meaning: Breath is disordered and not smooth. Zi Collection, Upper Volume, Page 10, Entry 03 Radical: Mouth (kǒu) Pronounced huo (falling tone) Pronounced xi (falling tone) Same pronunciation as "xia" (falling tone). Meaning: Same meaning.