dzixe'a lujvo

x1 is a/the lower jaw of x2.

Not to be confused with mandible of a insect/other arthropod, which is molja'u. See also mandible/jawbone (=dzixejbo'u).

In notes:

dzixejbo'u
b1 is a mandible/jawbone (mandibula) performing function b2 in body of b3..
molja'u
m1=j1 is the mandible of arthropod m2=j2