IPA: /ˈlɛvənɪŋ/
KK: /ˈlɛvənɪŋ/
A substance used in baking that helps dough rise by producing gas, making it light and fluffy.
Bakers often use yeast as a leavening agent in bread recipes.
Leavening → It is formed from "leaven" (from Old English *lef*, meaning to raise or to ferment) and "-ing" (a suffix indicating the action or process). The word "leavening" refers to the process of causing dough to rise through fermentation.
Think of the action of 'raising' ('leaven') dough through fermentation, which is what leavening does.