taboo
The English word "taboo" originates in the Tongan term tapu, or the Fijian tabu. The term was originally translated into English as "consecrated, inviolable, forbidden, unclean or cursed." A taboo is generally a vehement prohibition of an action based on the belief that such behavior is either too sacred or too objectionable for ordinary individuals to undertake. Such prohibitions are agreed upon in a given society and often are understood as transgressions that are subject to punishment from the gods or other supernatural beings. Taboos are present in virtually all societies, and many are shared throughout the world, although the 19th-century psychoanalyst Sigmund Freud suggested that incest and patricide were the only two universal taboos. According to recent research, however, while similarities do exist, there is no such thing as a universal taboo, and each cultural group has its own set of rules pertaining to acceptable and unacceptable behaviors.