douceur

plural douceurs

1. countableuncountableSweetness of manner: agreeableness, gentleness.
2. countableobsoleteuncountableSweet speech: a compliment.

   Synonyms: praise

3. countableuncountableA sweetener: a gift offered to sweeten another's attitude, a tip or bribe.

   1 more example

   When Dangerfield put the little roll in his hand, Irons looked suspicious and frightened, and balanced it in his palm, as if he had thoughts of chucking it from him, as though it were literally a satanic douceur. But it is hard to part with money, and Irons, though he still looked cowed and unhappy, put the money into his breeches' pocket, and he made a queer bow […]

   1863, Sheridan Le Fanu, The House by the Churchyard

   Synonyms: gift

4. UKcountableuncountableA tax break provided as an inducement to sell valuable items (especially art) to public collections rather than on the open market.