peräyden

Peräyden is a historical Finnish noun that appears in a small number of dialect glossaries and philological works. It denotes the hind part of an object, an animal, or a person, with its exact sense varying between sources. In some descriptions, peräyden refers specifically to hindquarters, while in others it is used more broadly for the rear or tail end of something, including non-anatomical referents such as a vehicle or a building. The term is not part of standard Finnish and is rarely used in contemporary language. Attestation is limited to 19th- and early 20th-century dialect collections; modern references generally consider it archaic or regional.

Etymology and form: The word blends perä "rear, back" with the historical suffix -yden, which was used in some Finnish dialects to form nouns. The combination underlines a spatial or anatomical sense tied to the rear, but etymological notes are inconsistent across sources.

See also: perä, Finnish dialectology, suffix -yden.