榫 (w)

(sǔn) mortise and tenon (slot and tab forming a carpenter's joint)

榫眼 (w)

(sǔnyǎn) mortise (slot cut into wood to receive a tenon)

榫销 (w)

(sǔnxiāo) dowel; carpenter's pin

榫凿 (w)

(sǔnzáo) mortise chisel

榫头 (w)

(sǔntou) tenon (wooden projection to fit into a mortise)