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

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: Leaven

• soothing
• soothing syrup
• soothingly
• soothly
• soothsayer
• soothsaying
• sootiness
• sooty
• sooty-black
• sop
• sop up
• soph
• Sophia Loren
• Sophie Tucker
• sophism
• sophist
• sophistic
• sophistical
• sophisticate
• sophisticated
• sophistication
• sophistry
• Sophocles
• sophomore
• sophomore class