Autoantonymy seems, in fact, to be the inherent tendency of words. Spinoza said that every determination is a negation, and to this extent the very use of a determinate word with a determinate meaning requires that one also implicitly say: this is not that. But to say what something is not is already to mention that other thing, and so to associate the thing you are mentioning with its opposite.

Justin Erik Halldór Smith, “Etymology from Memory, #6”