Read the dictionary definition of rue. All definitions for this word.
1. (French) a street or road in France
2. sadness associated with some wrong done or some disappointment
1. he drank to drown his sorrows
2. he wrote a note expressing his regret
3. to his rue, the error cost him the game
3. leaves sometimes used for flavoring fruit or claret cup but should be used with great caution: can cause irritation like poison ivy
4. European strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
5. feel remorse for; feel sorry for; be contrite about