枘凿

枘鑿
ruìzáo
  1. incompatible (abbr. for 方枘圆凿 fāngruìyuánzáo)
  2. (literary) compatible (lit. "mortise and tenon")

CEDICT

literary

Entry Composition

1 枘 ruì
  1. tenon
  2. tool handle
  3. wedge
2 凿 záo
  1. (bound form) chisel
  2. to bore a hole; to chisel; to dig
  3. (literary) certain; authentic; irrefutable
  4. also pr. zuò