Getting very close... "Exterminate! Exterminate!"

Exterminare 'to drive out' from ex- 'out of' + terminare 'to mark boundaries, set limits' from terminus 'boundary'.

I looked at a Doctor Who FAQ, and discovered that the Daleks were actually aliens in some kind of armor and not robots as I'd thought. They say "exterminate" a lot, but also "obey". Kind of childlike behavior, but what does it have to do with general education?