is pronounced kashér , meaning "fit" (in this context: "fit for consumption"). Food that may not be consumed is deemed treif ( in English, ), also spelled treyf . In case of objects the opposite of kosher is pasúl ( in English, Yiddish: ????).

Although the details of the laws of are numerous and complex, they rest on a few basic principles:
* Only certain types of mammals, birds, and fish, meeting specific criteria are kosher; the consumption of the flesh