A compound word may appear as a component of a compound, and this is rather common. For example, from the words vehnä (wheat), jauho (flour), and pussi (bag) we can form vehnäjauhopussi. It is interpreted so that the parts are vehnäjauho and pussi, simply because this is the only sensible interpretation, given the meanings of the words. It is rather rare that a nested compound is genuinely ambiguous so that that it can be divided into two major parts in different ways.
In a nested compound, the first syllable of second major part has secondary stress, e.g. véhnäjauhopùssi. A part that is itself a compound word may have a third-level stress. Thus, if we denote 1st, 2nd, and 3rd level stress by superscript digits after a stressed vowel, the pronunciation would be ve¹hnäja³uhopu²ssi. However, the pronunciation may be simpler, with just two secondary stresses: véhnäjàuhopùssi.