The term 'severely regretted' can be summed up in the four-letter word 'RUED'. This word is used to describe a feeling of deep regret or sorrow for something that has been done or said. It implies that the person who is feeling the regret is aware of the consequences of their actions and wishes they could undo them. The term is often used to describe a situation where someone has made a mistake and is now dealing with the repercussions of it.