leaven

/ˈlɛvən/
verb
  1. To add a substance to dough or batter to make it rise.
    • They learned how to leaven bread using natural starters.
    • You need to leaven the dough with yeast before baking.
    • The recipe says to leaven the mixture with baking powder.
  2. To lighten, enliven, or improve something, especially by adding a positive or interesting element.
    • Music can leaven the atmosphere of a dull party.
    • The speaker leavened her serious talk with funny stories.
    • He tried to leaven the tense conversation with a joke.
noun
  1. A substance, such as yeast, that is added to dough to make it rise.
    • Without leaven, the flatbread remained dense and hard.
    • The baker added leaven to the bread dough to help it rise.
    • She used a sourdough starter as a natural leaven.
  2. A quality or influence that lightens, enlivens, or changes something.
    • Her humor was the leaven that made the long meeting bearable.
    • The new teacher brought a leaven of fresh ideas to the school.
    • A little bit of optimism can be the leaven for a gloomy day.
Synonyms