Kashrut (also kashruth or kashrus, כַּשְׁרוּת) is a set of dietary laws dealing with the foods that Jewish people are permitted to eat and how those foods must be prepared according to Jewish law. Food that may be consumed is deemed kosher (/ˈkoʊʃər/ in English, Yiddish: כּשר), from the Ashkenazi pronunciation of the term that in Sephardic or Modern Hebrew is pronounced kashér (כָּשֵׁר), meaning "fit" (in this context: "fit for consumption"). Food that may not be consumed, however, is deemed treif (/treɪf/ in English, Yiddish: טרײף), also spelled treyf (Yiddish: טריף).
Source:
https://en.wikipedia.org/wiki/Kashrut
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