Extraordinary does actually make sense if you educate yourself a little bit. It does not mean more ordinary, people seem to think this because "extra" usually means more when used alone. However, "ex", the Latin prefix used in extraordinary, means "out of". So word means "out of the ordinary," and now everything makes sense. Also, extra, when used in Latin meant beyond, so again the word would mean "beyond ordinary." Make sense?
Take extraterrestrial, it means out of or beyon earth (terra meaning earth) and it has the same prefix as extraordinary. Yay!
Person: extraordinary is such a dumb word, it's like literally saying more ordinary, that makes no sense.
Me: no, it means out of the ordinary because the Latin prefix means out of or beyond, learn your shit.