sweet ‧ ener /ˈswiːtnə $ -ər/ BrE AmE noun
[ Word Family: noun : ↑ sweet , ↑ sweetener , ↑ sweetness , ↑ sweetie ; verb : ↑ sweeten ; adverb : ↑ sweetly ; adjective : ↑ sweet ]
1 . [uncountable and countable] a substance used to make food or drink taste sweeter:
No artificial sweeteners are used in this product.
2 . [countable] informal something that you give to someone to persuade them to do something, especially to accept a business deal:
These tax cuts are just a pre-election sweetener.