
Leaven
Culinary Term
Used mostly in cooking to describe ingredients that help dough rise.

The recipe requires a teaspoon of leaven for the pastry.
Literal Use
'Leaven' is usually used literally in the context of baking and not as a metaphor.

His grandmother taught him how to add leaven to the mix.
Physical Change
Leaven causes a visible change, making the dough expand and become fluffy.

Without leaven, the dough remained flat and hard.
Compare with
FermentYeast
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