| rue | (noun) (French) a street or road in France | - |
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| (noun) sadness associated with some wrong done or some disappointment | Synonyms: regret, ruefulness, sorrow |
| (noun) leaves sometimes used for flavoring fruit or claret cup but should be used with great caution: can cause irritation like poison ivy | - |
| (noun) European strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy | Synonyms: herb of grace, Ruta graveolens |
| ruefulness | (noun) sadness associated with some wrong done or some disappointment | Synonyms: regret, rue, sorrow |
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