rue in WordNet English dictionary

1. European strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy
   rue  herb of grace  Ruta graveolens 
   
2. sadness associated with some wrong done or some disappointment
   "he drank to drown his sorrows"; "he wrote a note expressing his regret"; "to his rue, the error cost him the game"
   sorrow  regret  rue  ruefulness 
   
3. (French) a street or road in France
   rue 
   
4. leaves sometimes used for flavoring fruit or claret cup but should be used with great caution: can cause irritation like poison ivy
   rue 
   

1. feel remorse for; feel sorry for; be contrite about
   repent  regret  rue