I'm no professional mathematician, but, as someone who studies mathematics in his free time, I've never struggled with “scary-sounding” terminology that tells m

I'm no professional mathematician, but, as someone who studies mathematics in his free time, I've never struggled with “scary-sounding” terminology that tells me up-front how abstract a concept is. On the other hand, I have struggled with familiar-sounding names being used for unfamiliar structures. For instance, non-Hausdorff “spaces” totally baffle my (admittedly not very well-trained) geometric intuition about space.