leaven
noun
[ ˈlɛv(ə)n ]
• a substance, typically yeast, that is used in dough to make it rise.
• a pervasive influence that modifies something or transforms it for the better.
• "they acted as an intellectual leaven to the warriors who dominated the city"
leaven
verb
• cause (dough or bread) to rise by adding yeast or another raising agent.
• "it only take a little bit of yeast to leaven the bread"
• permeate and modify or transform (something) for the better.
• "the proceedings should be leavened by humour"
Similar:
permeate,
infuse,
pervade,
penetrate,
imbue,
suffuse,
transform,
modify,
enliven,
lighten,
quicken,
inspire,
stimulate,
liven up,
invigorate,
vivify,
ginger up,
energize,
electrify,
galvanize,
perk up,
brighten up,
cheer up,
season,
spice,
buck up,
pep up,
add zest to,
add zing to,
Origin:
Middle English: from Old French levain, based on Latin levamen ‘relief’ (literally ‘means of raising’), from levare ‘to lift’.
