But, as a matter of fact, there are species which are arrested; there are some that retrogress.
What had caused the man to retrogress Luis and Luise Obispo?
We don't stand still or retrogress; we keep going on and up.
Would I could retrogress over the devious and enchanting itinerary.
According to him the eyes of Proteus may develop to a certain point and then retrogress ...