sufti -sfu- gismu

x₁ is a/the hoof [body-part] of x₂.

See also xirma.

jbovlaste

In notes:

xirma: x₁ is a horse/equine/[colt/mare/stallion/pony] of species/breed x₂.
cmaxi'a: xi₁=c₁ is a pony of species/breed xi₂.