The crossword solutions for the term 'FEEL REGRET' are 'RUE' and 'REPENT'. RUE is a three letter word meaning to feel deep sorrow or regret for something done or experienced in the past. REPENT is a six letter word meaning to feel remorse or regret for one's past actions or sins and to make a commitment to change one's behavior. Both words are used to express feelings of regret or sorrow for something that has happened in the past.