牟
moo
On-Yomi: ボウ
Koohii stories:
1) [raulir] 9-1-2007(48): If you elbow a cow it's will moo. (or alternatively, a cow mooing, the sound being somewhat like ム).
2) [mantixen] 2-8-2009(7): Elbow a cow to make it moo (ム).
3) [dilandau23] 27-5-2007(4): Turns out that raulir is correct, According to RTK2[2nd ed. Frame 41] this is the root of the katakana ム.
4) [blannk] 21-12-2009(2): [+raulir & mantixen] Elbow a bilingual cow & she will ム & moo.
5) [Elphalpo] 17-7-2010(1): The ム cow says, "moooo!".