| 词汇 | crumb |
| 词根词缀 | 词源： O.E. cruma, from a W.Gmc. root of obscure origin. The -b- appeared c.1450, in part by analogy with words like dumb, in part from crumble. Slang meaning "lousy person" is 1918, from crumb, U.S. slang for "body-louse" (1863), so called from resemblance. |
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