leaven
🇺🇸
/ˈlevn/
🇬🇧
/ˈlevn/
To make dough rise with yeast or another raising agent.
She leavened the dough to bake fresh bread.
To add something to improve or make a situation more lively.
He leavened his lecture with a few personal anecdotes.
A substance like yeast used to make dough rise.
Adding leaven makes the bread fluffy and soft.