Observe the following sentence:
"What stops a murderer from killing another innocent soul, and then another, and then another, etc.?"
Perhaps a better way of articulating this is with an ellipses?
"What stops a murderer from killing another innocent soul (and then another, and then another...)?"
"Et cetera" is used to express "and other things", or "and so forth". This meaning is not exactly what is trying to be evoked in the above example. The meaning needed is closer to "and more of the same thing" rather than "and other similar things." "Et al." is similar to "et cetera" and thus also inappropriate.
Is there a better way of expressing a theoretical relentless repetition of something, besides using "et cetera" or an ellipses?
Please feel free to re-phrase the above example to better communicate this idea.