regionu

Regionu is the genitive singular form of the Polish noun region, meaning a geographic area or bounded part of a country. In Polish, region is masculine; its nominative singular is region, and its genitive singular is regionu. Other common forms include regionowi (dative), region (accusative for inanimate nouns), regionem (instrumental), and regionie (locative). The form regionu is used to express possession, association, or relation, such as in phrases like powierzchnia regionu (the area of the region), język regionu (the language of the region), and kultura regionu (the culture of the region). It also appears after numerals or adjectives that require the genitive case.

Etymology and cognates: The word region derives from Latin regio, via Old French region, and entered Polish in the medieval period. The genitive form regionu reflects the standard masculine noun inflection pattern in Polish, and cognates or parallel forms are found in other Slavic languages, such as Czech, where regionu serves a similar function.

Usage notes: Regionu is predominantly found in formal or descriptive writing and in contexts that describe belonging, attribution, or composition of a region. In spoken Polish, speakers may opt for simpler constructions using adjectives or alternative noun phrases, depending on style and clarity. The related adjectives include regionalny (regional) and regionowy (regional in a slightly different sense), which describe features belonging to a region rather than naming the region itself.