tuple -tup-tu'e- gismu

x1 is a/the leg [body-part] of x2; [metaphor: supporting branch].

See also stani, zbepi, jamfu, jimca, sanli.

In notes:

jamfu
x1 is a/the foot [body-part] of x2; [metaphor: lowest portion] (adjective:) x1 is pedal.
jimca
x1 is a branch/bough/limb of x2; x2 forks into branches x1; [preferred over metaphorical birka].
sanli
x1 stands [is vertically oriented] on surface x2 supported by limbs/support/pedestal x3.
stani
x1 is a/the stalk/stem/trunk [body-part] of plant/species x2; [metaphor: main support].
zbepi
x1 is a pedestal/base/stand/pallet supporting x2 (object/event), of materials/properties x3.
mei
convert number to cardinality selbri; x1 is the mass formed from set x2 whose n member(s) are x3.
cibyseltu'e
t2 is three-legged with legs t1.
galtupcra
c1=g1 is the lap of t2.
relseltu'e
t2 is two-legged with legs t1.
terdzu
x3=c1 walks/strides/paces on surface x2=c2 using limbs x1=c3.
tsetupyzbe
t1=zb1 is a lap [body part] of t2=zu1 supporting zb2.
vonseltu'e
t2 is four-legged with legs t1.
zaglamtu'e
t1 is the thigh of t2=z2.