birka -bir- gismu

x1 is a/the arm [body-part] of x2; [metaphor: branch with strength].

Also elbow (= bircidni), wrist (= xanterjo'e), appendage (but jimca, rebla preferred). See also jimca, janco, xance, rebla.


In definition:

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

In notes:

janco
x1 is a/the shoulder/hip/joint [body-part] attaching limb/extremity x2 to body x3.
rebla
x1 is a/the tail/appendix [body-part] of x2; [metaphor: trailing, following portion/appendage].
xance
x1 is a/the hand [body-part] of x2; [metaphor: manipulating tool, waldo].
birgutci
g1 is g2 cubit/cubits (length unit).
birja'i
j1 is a bracelet on arm j2=b1.
birstizu
s1 is an armchair.
galbirka
g1=b1 is a forearm of b2.
mumbircurnu
x1 is a starfish of species x2.
selbirka
x2=b1 is an arm of body x1=b2.
tu'urbirka
b1 = t1 is a tentacle / tube-shaped arm [body part] of b2.
xancidni
x1=c1 is a wrist of x2=c2.