Portmanteautyyppisissä

Portmanteautyyppisissä is a Finnish adjective derived from the noun portmanteau, meaning "portmanteau-like" or "related to portmanteaus." The word portmanteau itself comes from French porte‑manteau, literally "coat‑hanger," and was popularized in English by Lewis Carroll who coined it for words that blend two roots, such as "smog" (smoke + fog) or "brunch" (breakfast + lunch). In Finnish, the concept is expressed by portmanteaus (short for combination of two lexical elements into one) and the corresponding adjective suffixed with -tyyppinen, which denotes similarity in type or character.

The structure of a portmanteautyyppinen word involves overlapping segments of meaning and sound from two distinct words. Finnish examples include "sisäpuolinen" (inside + outside) and "nukkumaa" (nap + dream). Such blends are used to create new terms that convey compound meanings more concisely. The morphological process is not unique to Finnish; many languages create portmanteaus via hyphenation, contraction, or amalgamation.

In linguistic studies, portmanteautyyppinen forms are analyzed as a form of word formation that combines elements of compounding, blending, and reduplication. They are often discussed in the context of lexical economy, semantic transparency, and phonological constraints. The term is mostly used in academic literature and by language enthusiasts to describe innovative lexical phenomena.