The English word taboo comes from the Tongan word tapu. In Tongan, tapu referred to something that was forbidden, sacred, or set apart. It was not just about social discomfort. It could describe people, places, objects, or actions that were restricted for religious, cultural, or social reasons.
English speakers encountered the word in the South Pacific during the late 1700s. It became established in English as taboo, with a spelling adapted to English pronunciation and writing habits.
This word is also part of a wider Polynesian family of related forms:
- Tongan: tapu
- Māori: tapu
- Hawaiian: kapu
These related words show that the idea was not unique to one island or one language. The exact use could vary by culture, but the core meaning often involved restriction and sacredness.
In modern English, taboo usually means something a society avoids or treats as unacceptable. For example, people may call certain topics taboo subjects. That modern use is broader than the original sense, but it still keeps the idea of something socially or culturally off limits.