About
哞 (mōu) is a phono-semantic compound. The left-side mouth radical 口 (kǒu) classifies it as an onomatopoeic word for a vocal sound, while the right-side element 牟 (móu) provides the phonetic guide. 牟 historically relates to cattle lowing, containing the cow character 牛 (niú) within its structure, thus also contributing a secondary semantic link. The character exclusively represents the lowing sound of bovines, serving purely as an onomatopoeia without extended meanings. Its structure directly connects the act of vocalizing to the specific animal.