In many languages, e.g., in German, syncretism, a particular type of systematic morphological ambiguity, is pervasive.
there is no simple morphological processing method that would produce a representation in which all inflected forms of "to ring" are marked as having a common lemma; and no such method in which an unseen form like "aromatizing" is reliably analyzed as a form of "aromatize" whereas an unseen form like "antitrafficking" is reliably analyzed as the compound "anti+trafficking".