There are some religious concepts that could be seen as auto-antonyms. The Polynesian words from which we get "taboo" refer to something sacred to the gods, which therefore ordinary people are forbidden to use or interfere with.
The taboo thing could therefore be seen as very good and important (for gods) or as very bad, improper, or dangerous (for people, outside of the appropriate religious context). I think that many cultures have had a similar dual connotation in words related to sacred things, even if they don't have exactly the same cultural rules.
It's interesting to look at the meanings of Latin "sacer" (the origin of our word "sacred") as an analogy:
https://en.wiktionary.org/wiki/tapu https://en.wiktionary.org/wiki/kapu#Hawaiian
The taboo thing could therefore be seen as very good and important (for gods) or as very bad, improper, or dangerous (for people, outside of the appropriate religious context). I think that many cultures have had a similar dual connotation in words related to sacred things, even if they don't have exactly the same cultural rules.
It's interesting to look at the meanings of Latin "sacer" (the origin of our word "sacred") as an analogy:
https://en.wiktionary.org/wiki/sacer#Adjective