vapäätteisten
Vapäätteisten is a term used in some discussions of Finnish morphology to designate a specific class of inflectional endings associated with adjectives of the -inen type. The form is typically described as involving the -isten ending in the plural genitive, in certain contexts such as attributive phrases or older or dialectal registers. The term is not part of standard Finnish grammar and is rarely found in reference grammars or official language guidance. Instead, it appears in niche scholarly writings, linguistic blogs, and student notes that investigate how Finnish adjectives change across cases and numbers.
Because of its limited circulation, definitions and examples vary between sources, and there is no consensus
Notes and limitations: vapäätteisten is a comparatively obscure label outside of select linguistic circles, and readers