sweetening

(noun) something added to foods to make them taste sweeter. Synonyms: sweetener.

(noun) an improvement that makes something more agreeable. Synonyms: enhancement.

(noun) the act of adding a sweetener to food.

(verb) make sweeter in taste. Synonyms: sweeten, dulcify, edulcorate, dulcorate.

(verb) make sweeter, more pleasant, or more agreeable. Synonyms: sweeten. Example: "Sweeten a deal."