1. (noun) leaven, leavening
a substance used to produce fermentation in dough or a liquid
Synonyms: leavening, leaven
2. (verb) leaven, leavening
an influence that works subtly to lighten or modify something
Synonyms: leavening, leaven
3. (verb) raise, leaven, prove
cause to puff up with a leaven
Synonyms: kindle, farm, rise, put forward, leaven, set up, try, upgrade, try out, show, testify, provoke, elevate, kick upstairs, recruit, upraise, enkindle, establish, put up, heighten, stir, evidence, elicit, advance, conjure, lift, examine, fire, arouse, grow, bring up, conjure up, nurture, resurrect, levy, promote, erect, essay, prove, call down, get up, produce, shew, call forth, invoke, turn out, demonstrate, raise, turn up, evoke, rear, parent, enhance, test, bear witness
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