Definition
To leaven means to cause something to rise or become lighter, often through fermentation, like adding yeast to bread dough. 🍞 It can also metaphorically mean to subtly influence or permeate something, often with a positive or enlivening effect. Think of it as the secret ingredient that makes everything better. It's not just about physical change, but also about adding a spark. Without leaven, things can be flat and uninspired. Consider it the opposite of something that weighs you down.