The term 'remorseful feeling' can be broken down into four crossword solutions: SHAME (5 letters), PANG (4 letters), GUILT (5 letters), and TWINGE (6 letters). SHAME is an emotion characterized by a sense of dishonor or disgrace, often accompanied by a feeling of GUILT. PANG is a sudden sharp feeling of physical or mental pain. GUILT is a feeling of responsibility or remorse for some offense, crime, wrong, etc., whether real or imagined. TWINGE is a sudden, sharp, localized pain. All of these words describe a feeling of regret or sorrow for something done or not done.