sweetens , sweetening , sweetened
If you sweeten food or drink, you add sugar, honey, or another sweet substance to it.
He liberally sweetened his coffee.
他在咖啡里加了大量的糖。
If you sweeten something such as an offer or a business deal, you try to make someone want it more by improving it or by increasing the amount you are willing to pay.
Kalon Group has sweetened its takeover offer for Manders.
卡隆集团已经向曼德斯开出了优惠的收购报价。