jamfu -jaf-jma- gismu

x1 is a/the foot [body-part] of x2; [metaphor: lowest portion] (adjective:) x1 is pedal.

See also jicmu, genja, zbepi, tuple, jubme, xance, tamji.

In notes:

genja
x1 is a root [body-part] of plant/species x2; [metaphor: immobile, supporting, nourishing].
jicmu
x1 is a basis/foundation/underlying or fundamental principle of x2; x1 is at the bottom of x2.
jubme
x1 is a table/flat solid upper surface of material x2, supported by legs/base/pedestal x3.
tamji
x1 is a/the thumb/big toe [body-part] on limb x2 of x3; [metaphor based on relative shape].
tuple
x1 is a/the leg [body-part] of x2; [metaphor: supporting branch].
xance
x1 is a/the hand [body-part] of x2; [metaphor: manipulating tool, waldo].
zbepi
x1 is a pedestal/base/stand/pallet supporting x2 (object/event), of materials/properties x3.
cibjmagutci
g1 is g2 yard/yards (length unit).
jmadegji
j1=d1 is a toe of j2=d2.
jmagutci
g1 is g2 international foot/feet (length unit) in length.
jmarixtendo
x1 is the Achilles tendon of x2
pinxela
x1 is a pincer, chela, claw, nipper of an arthropod x2