Kef
Kef is a term that can refer to more than one idea, depending on the context. In food and drink, kefir is a fermented beverage made with kefir grains, a symbiotic culture of bacteria and yeasts. Kefir originated in the Caucasus and spread to parts of Eastern Europe and the Middle East. It is typically tangy, slightly effervescent, and can be consumed plain or flavoring. Some discussions use the shortened form “kef” to refer to kefir, though kefir is the more common term in most contexts. There are also variations such as water kefir, which is brewed with sugar water or fruit juice using a different culture.
In the field of audio technology, KEF is a British manufacturer of loudspeakers and related audio equipment.
Other uses of the term are mainly as a proper noun, such as in place names or