词汇 | aplomb |
词根词缀 | 词源: "assurance, confidence," 1828, from Fr. aplomb (16c.), lit. "perpendicularity," from phrase à plomb "poised upright, balanced," lit. "on the plumb line," from L. plumbum "(the metal) lead" (see plumb), of which the weight at the end of the line was made. |
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