The term pentimento is an Italian word which means repentance. Pentimento is an image that is visible in a painting either as an underlying painting or as traits of original or earlier drawing or as a part of an image or picture.  This becomes visible when the topmost layer of new painting has been torn out or has become see through due to oldness and reveals the old earlier layers underneath. This can bring a ghostly effect and the previous painting may appear vulgar and worn out.