jimca -jic- gismu

x₁ is a branch/bough/limb of x₂; x₂ forks into branches x₁; [preferred over metaphorical birka].

Also appendage. See also birka, rebla, tuple.

In notes:

birka: x₁ is a/the arm [body-part] of x₂; [metaphor: branch with strength].
rebla: x₁ is a/the tail/appendix [body-part] of x₂; [metaphor: trailing, following portion/appendage].
tuple: x₁ is a/the leg [body-part] of x₂; [metaphor: supporting branch].
jicfle: x1=f₁ is a tributary of x2=f₂ flowing in direction to/towards x3=f₃=j₁ from direction/source x4=f₄
jicycma: c₁ is a twig/sprig of j₂
jicyjirna: jr₁=ji₁ are the antlers of jr₂=ji₂
jicymivykle: k₁=jm₁=ji₃ is a phylum [animals]/division [plants] within/of kingdom [biology] k₂=ji₂.
ri'erjimca: x₁=j₁ is a tributary of river x₂=j₂=r₁=r₄ of land mass x₃=r₂, draining watershed x₄=r₃
tentaku: x₁ is a tentacle