English has not been in its final form forever, therefore there was a language or languages that preceded it. English words derive from one of these previous languages. Since a word from another language cannot be an English word, English does in fact not have any English words except ones that sprang arbitrarily out of nowhere.
As per my other reply, I'm genuinely shocked that you took my comment to be serious. It's basically as satirical one can get of the position that a word cannot be a word in multiple languages. Poe's law and all that I suppose.
