This Hebrew word means "proper" or "fit", and specifically refers to food prepared according to the orthodox dietary and religious laws. What is the word?

The word in question originates from the Hebrew term "kasher," which translates to "fit" or "proper." It describes food that is prepared in accordance with the complex Jewish dietary regulations known as "kashrut." These laws, with their roots in the Torah, provide a framework for what may be consumed and how it must be handled from production to the point of serving. The system is not about a rabbi blessing the food, a common misconception, but rather about adherence to a strict set of religious principles. Any food can be kosher as long as it follows these established rules.

The principles of kashrut are detailed and extensive. They specify which types of animals are permissible to eat; for instance, mammals must both chew their cud and have cloven hooves, which is why animals like cows and sheep are allowed, but pigs are forbidden. In seafood, only fish with both fins and scales are considered fit for consumption, thereby excluding all shellfish. Furthermore, permitted birds and mammals must be slaughtered according to a specific humane process called "shechita," and all blood must be removed from the meat before it is cooked.

One of the most fundamental and widely recognized rules is the strict separation of meat and dairy products. Based on a biblical passage, this law prohibits eating or cooking meat and milk together. To ensure this separation, a kosher kitchen will typically maintain two complete sets of pots, pans, dishes, and utensils—one exclusively for meat and the other for dairy. Foods that contain neither meat nor dairy, such as fruits, vegetables, and grains, are known as "pareve" and can be enjoyed with either category.