also: べつび
noun
separate fire for ritual purity; cooking on a separate fire to avoid impurity
A Shinto practice of using a separate fire for cooking when ritual purity is required, such as during religious ceremonies or to avoid contamination from death or menstruation. The term is technical and primarily encountered in discussions of traditional customs.
神事の前には別火で料理を作る。
Before a Shinto ritual, meals are prepared using a separate fire.
昔は、喪中や生理中の女性は別火で食事を用意した。
In the past, women in mourning or menstruating prepared food using a separate fire.
Compound of 別 (separate) and 火 (fire). The exact historical origin is uncertain, but the term reflects Shinto purity customs.