Comments:АПиПЯЯ 36, 293, Лексика 180. The Mong.-Tung. match is precise; other reflexes present bigger or lesser problems, possibly of tabooistic nature. PJ has irregular tone (but cf. the accentuation in Kyoto, pointing to *mùká-); in PT one would rather expect a back vowel; the Kor. word is analysed as "ink-snake" (which is probably a folk-etymology).