enter to exit

it's just that simple.  you're at the ATM, you've paid your surcharge, you've received your money, you're all done. but you want to do something to make sure the person behind you in line doesn't go on with the remainder of your transaction. you want to --what's the word?-- exit. but how to do that?  if only there was a self-evident way...

and if we want to understand how far along jargonism has come in this, our beloved english language, to reach a point where we will look at two words that are in no way not contradicting antonyms but we at first and further glances read them fluidly understanding what they mean without ever squinting at the unpunctuated imperative suspecting that something, maybe, is wrong, we will begin here.