aplomb: [18] Originally, aplomb meant literally ‘quality of being perpendicular’. It was borrowed from French, where it was a lexicalization of the phrase à plomb ‘according to the plumb line’ (plomb came from Latin plumbum ‘lead’, also the ultimate source of English plumb, plumber, plumbago, and plummet). The notion of ‘uprightness’ gave rise in the 19th century to the metaphorical sense ‘composure’. => plumb, plumber, plummet
aplomb (n.)
"assurance, confidence," 1828, from French aplomb (16c.), literally "perpendicularity," from phrase à plomb "poised upright, balanced," literally "on the plumb line," from Latin plumbum "(the metal) lead" (see plumb (n.)), of which the weight at the end of the line was made.
实用例句
1. The whole cast executed the production with truly professional aplomb.
全体演职人员以一种真正的专业精神，从容不迫地开始了影片的制作。
来自柯林斯例句
2. She performs the duties of a princess with great aplomb.
她泰然自若地履行王妃的职责.
来自《简明英汉词典》
3. Carried off the difficult situation with aplomb.
