In James Cook's 1777 book A Voyage to the Pacific Ocean, he detailed the Tongan custom of declaring immoral things taboo. This mainly included menstruation, but also other "unclean" things. There are two possible origins of this. The first is that it's from ta-bu, which meant "sacred" and is a portmanteau of ta, meaning "mark", and bu, meaning "especially" (emphasizing the importance of the mark in question). The more likely theory (since it actually has cognates in other Polynesian languages) is tapu, a word also with a similar definition of "sacred" but able to be reconstructed to a Proto-Polynesian word tapu, "prohibited". Whatever the case, finding out the truth is difficult due to a lack of evidence, but it is nonetheless clear that what is taboo to us is blasphemy to the ancient people of the South Pacific.
Adam Aleksic, a leading contender for valedictorian of his high school, is a 211-month-old boy with disturbing interests in etymology, vexillology, geography, and law. Adam would like to one day visit Tajikistan and probably isn't spying for the Kyrgyz government.
The Etymology Nerd