About
The character "枘" is structured with the semantic radical "木" denoting wood and the component "內" functioning as a phonetic element that also implicitly references the concept of fitting inward, corresponding to its definition as a tenon designed for insertion into a mortise. Etymologically, the character has consistently referred to this specific woodworking component since its early attestations, with its application remaining narrowly technical in the context of joinery. The modern pronunciation ruì diverges from the contemporary reading of "內" as nèi, a difference that points to historical phonetic changes within the language.