Transgression

It is interesting to see a word shift meanings before, as it were, our very eyes. Trangression and transgressive are a long way on the way to acquiring wholly positive meanings (something like 'liberatory', 'unconstrained', 'life-affirming', 'joyous'). Which is to say, although murder, rape, violence, imperialism and so on are still strictly speaking transgressive, they're no longer what people think of when they use that word.