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Phonological evidence for morpho-syntactic structure in Athapaskan

Abstract Athapaskan verbal morphology appears to violate the Mirror Principle in multiple ways and, thus, the ordering of affixes in these languages has resisted a straightforward analysis. We adopt a new morphological tool of Iterative Root Prefixation, which allows for a more direct mapping from syntax to morphology in languages of this profile. Apparent violations of affix ordering that remain, namely the puzzling placement of the transitive and causative morphemes, are argued to be explained by overriding phonological constraints.