(of a price or amount charged) unreasonably high.
Late Middle English (originally describing a legal case that is outside the scope of a law): from late Latin exorbitant- ‘going off the track’, from exorbitare, from ex- ‘out from’ + orbita ‘course, track’.
I hope you will not consider it an exorbitant use of power that I use today’s word as a springboard to improve yesterday’s illustration. I thought it seemed to look like a wall projection, so I revised it. (Make Yourself Happier™)