A self-intensifier is a form that accompanies a °nominal and indicates that the nominal’s referent is the central referent in a centre-periphery configuration.
"The term intensifier is here used for expressions like English himself /herself / itself when they are used in an adjunct position (e.g., the president himself ), for Latin ipse/ipsa/ipsum, Italian stesso/stessa, Russian sam/samá/samó, German selbst, etc., and their counterparts in other languages." (König & Gast 2006: 223)