About
牯 is a phono-semantic compound. The semantic radical 牛 (ox) on the left indicates its meaning relates to cattle, specifically denoting a wooden pen, enclosure, or hobble for livestock. By extension, it can mean to confine or restrain animals or people. The phonetic component 告 (gào) on the right provides the sound, though the character's pronunciation shifted to "gù" in modern Mandarin. This left-right structure, meaning radical with phonetic element, is a common formation for nouns in the livestock domain.
Etymology Hide
