et-see is the objectively correct version, ee-tee-see is the marginally more correct, but less funny version of it. And etcetera is just illegal, you should be jailed if you ever say that.
Though I know it means "et cetera" when reading my brain has always "heard" that word - whether in the context of the word "etc." or the computing /etc - as pronounced "ettick." As in, "you need to edit your ettick f-stab file."
TIL, I had no clue why we call this arbitrary important file a file stab, but fs tab makes sense now. F stab is more fun to say though (but has probably confused more than just me)