Forbidden relationships in Judaism (Hebrew: עריות‎ Arayot, or איסורי ביאה Isurey bi'ah) are those intimate relationships which are forbidden by prohibitions in the Torah and also by rabbinical injunctions. Engaging in some forbidden relationships is considered such a serious transgression in Jewish law that unlike most other negative commandments, in which one is allowed to transgress the commandment when a life is on the line, engaging in a forbidden relationship is forbidden, even when the alternative is death.