On gloss:

cutybo'u in sense "bone"
b1 is a rib of body b3=c2.
srubo'u in sense "curved bones"
s1=b1 is a rib of s2=b2.

On affix form:

cribe
x1 is a bear/ursoid of species/breed x2.

In definition:

cutne
x1 is a/the chest/thorax/upper trunk/[rib cage/breast] [body-part] of x2.

In notes:

mlat
Cat