leaven

Noun
  1. A substance used to produce fermentation in dough or a liquid (synset 114958169)
    is a type of: substance - a particular kind or species of matter with uniform properties
    subtypes:
    • baking powder - any of various powdered mixtures used in baking as a substitute for yeast
    • sourdough - a leaven of dough in which fermentation is active; used by pioneers for making bread
    • barm, yeast - a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey
    same as: leavening
  2. An influence that works subtly to lighten or modify something (synset 105878029)
    "his sermons benefited from a leavening of humor"
    is a type of: imponderable - a factor whose effects cannot be accurately assessed
    same as: leavening
Verb
  1. Cause to puff up with a leaven (synset 201979601)
    "unleavened bread"
    causes: prove, rise - increase in volume
    is a type of: bring up, elevate, get up, lift, raise - raise from a lower to a higher position
    same as: prove, raise

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