In contrast to the lexeme, a word form (grammatically determined form) is an inflected word that can be described using grammatical categories . The forms needed , needed , need are word forms of the strain process water . However, the derivative useful is not one of them. All word forms of a lexeme taken together form an inflection paradigm . This distinction defines the fundamental difference between lexicon and syntax in linguistics .
The qualitative distinction between word forms and lexemes, however, is not based on provable sentences, but is a basic assumption that linguistics sets axiomatically . In this context, Karl Bühler even speaks of the “ dogma of lexicon and syntax” and warns against attacking this “most characteristic structural law” for linguistics.
- Karl Bühler : The Axiomatics of Linguistics. Klostermann, Frankfurt 1933.