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Noun: leavening  le-vu-ning
  1. An influence that works subtly to lighten or modify something
    "his sermons benefited from a leavening of humour";
    - leaven
  2. A substance used to produce fermentation in dough or a liquid
    - leaven
Verb: leaven  le-vun
  1. Cause to puff up with a leaven
    - raise, prove

Derived forms: leavenings

Type of: bring up, elevate, get up, imponderable, lift, raise, substance

Encyclopedia: Leavening, North Yorkshire