| 词汇 | leaven |
| 词根词缀 | 词源： leaven (n.) mid-14c., from O.Fr. levain (12c.), from L. levamen "alleviation, mitigation," but used in V.L. in its literal sense of "a means of lifting, something that raises," from levare "to raise" (see lever). The verb is attested from early 15c. |
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