| 词汇 | barm |
| 词根词缀 | 词源： O.E. beorma "yeast, leaven," also "head of a beer," from PIE base *bher- "to boil up" (cf. Du. berm, M.L.G. barm, L. fermentum "substance causing fermentation," Skt. bhurati "moves convulsively, quivers," M.Ir. berbaim "I boil, seethe"), from base *bhreue- "to boil, bubble, effervesce, burn" (see brew). |
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