morphological derivation

Pre-initial and post-final consonants were frequently used in morphological derivation.

Desiderative forms are often verbs, derived from a more basic verb through a process of morphological derivation.

I.e., there is no overt morphological derivation which might indicate what direction the derivation has occurred in.

How a word is chunked relates to its morphological derivation, as seen by contrasting morphologically similar pairs such as:

Many of these words have been in use in Romansh for long enough that German speakers no longer recognize them as German, and for morphological derivations of them to appear, in particular through the suffix -egiar iar, as in surs.