Negation through reduplication and tone: implications for the Lexical Functional Grammar/Paradigm Function Morphology interface

Morphological marking of negation through verbal reduplication and tone is a typologically rare phenomenon attested in Eleme (Niger-Congo; Nigeria). Using Lexical Functional Grammar (LFG) and Paradigm Function Morphology (PFM) to model first-hand data, I argue that reduplication is not a direct exponent of negation in Eleme, but an asemantic morphomic process, indirectly associated with the presence of a negative polarity feature in LFG’s m(orphological)-structure. While negative verb forms of this kind are typologically unusual, the data can be explained by independently motivated morphology-internal principles. The empirical facts thereby provide support for an m-structure, characterised by its own principles and rules, which interfaces with a bifurcated lexicon that separates content from form.