Editing Distributed morphology (section)

===Feature impoverishment===
Impoverishment (a term introduced into the theory in Bonet 1991) refers to a change in the feature content on a terminal node prior to Vocabulary Insertion, resulting in a less marked feature content.
* Feature deletion: This is accomplished by deleting a feature or by changing it from a marked to an unmarked value (e.g. [+plural] to [-plural]). Impoverishment accounts for cases in which spell-out of a terminal node by a featurally specific Vocabulary Item is blocked by a less specific Vocabulary Item.
* Feature obliteration: Impoverishment can  target an entire terminal node (rather than just one of its features), in which case it is referred to as 'obliteration'.<ref>Arregi, Karlos & Andrew Nevins. 2007. Obliteration vs. Impoverishment in the Basque g-/z- Constraint, in Proceedings of the 26th Penn Linguistics Colloquium, Penn Working Papers in Linguistics 13.1, 1{14. Penn Linguistics Club, Philadelphia.</ref> This results in the complete absence of the morpheme from the structure of the word.