Pronounced means very noticeable indeed. A pronounced limp, a pronounced accent, a pronounced effect.
It is used above all in medicine and description for something clearly marked rather than slight. It is also the past of pronounce, which is a different word doing a different job, and only the position in the sentence tells you which is meant.
1adjectivepronouncedVery noticeable indeed.
“She speaks English with a pronounced French accent.”
pronounced is a degree.