koszern

Koszern is a term that appears in Polish-language contexts related to the concept of kosher. In standard Polish, the adjective used to describe foods that comply with Jewish dietary laws is koszerny. The form koszern without the ending is nonstandard and rare, appearing mainly as a variant in informal writing or as a misspelling, and it is not used in formal language. The word derives from the same source as koszerny, through the Yiddish kasher and Hebrew kasher meaning fit or proper.

In regular usage, koszerny describes foods and products that meet kashrut. The term has entered Polish through contact with Jewish communities and translations of religious and dietary terminology. Like other Polish adjectives, koszerny inflects for gender and number, producing koszerna in the feminine and koszerne in the neuter, with corresponding forms for plural nouns.

Beyond dietary usage, koszern may appear as a surname or place name in some Polish-speaking regions, but such uses are uncommon and not widely documented. When encountered as a proper noun, it is typically capitalized and treated as a name rather than a descriptor.

See also: kosher, Kashrut.