kamjybo'u lujvo

k₁=b₁ is a vertebra of b₃ ; b₃ is a vertebrate.

In notes:

kamju: x₁ is a column/pillar of material x₂.
bogykamju: k₁ is the spine of b₃. b₃ is a vertebrate.
terbo'u: x₃=b₁ is bone, performing (abstract) function x₂=b₂ in organism x₁=b₃.