About
Structurally, 耵 is a phono-semantic compound where the left radical 耳 (ear) provides the anatomical meaning, and the right component 丁 contributes its phonetic pronunciation. It exists solely to denote earwax, used almost exclusively in the medical compound 耵聍 for cerumen. As it is confined to this single biological term, it carries no extended or metaphorical meanings, exemplifying how some Chinese characters were created with precise medical specificity by pairing a body-part radical with a phonetic element.