Tapu[1][2][3] is a Polynesian traditional concept denoting something holy or sacred, with "spiritual restriction" or "implied prohibition"; it involves rules and prohibitions. The English word taboo derives from this later meaning and dates from Captain James Cook's visit to Tonga in 1777.
The concept exists in many Polynesian societies, including traditional Māori, Samoan, Kiribati, Rapanui, Tahitian, Hawaiian, and Tongan cultures, in most cases using a recognisably similar word (from Proto-Polynesian *tapu), though the Rotuman term for this concept is "ha'a". In Hawaii, a similar concept is known as kapu[4] - /t/ and /k/ are standard allophonic variations in Hawaiian phonology.
Here in this wahi kapu, sacred place