u, a connective.
m, sign of possession.
i, a connective.
nân, termination of ⅓ person plural.
ak, termination of animate plural (the cross is spoken of as animate by a figure of speech).
Not a single one of the above elements can be employed as an independent word. They are all only the raw material to weave into and make up words.
As a characteristic specimen of incorporation we may select this Nahuatl word-sentence:
onictemacac,
I have given something to somebody:
which is analyzed as follows: