“anti” also doesn’t mean opposite, it means against. The roots of the word, tracing back to the Greek, means against. As it does in French and it’s Sanskrit version. All forms of it mean opposed to. This is why language is important and some checks should be there to counter the “language is malleable” argument that people use as an excuse to not learn how to use words correctly. The idea that anti means opposite has been around as long as I can remember, and definitely longer than that, but it drastically changes the meaning of words.