词汇 | x |
词源 | X. The 24th letter in our alphabet represents the 14th letter of the Greek alphabet, xi. The Romans used X to denote the number 10 and x in mathematics generally means “an unknown quantity.” One theory holds that the X stands for a kiss because it originally represented a highly stylized picture of two mouths touching—x. Furthermore, in early times illiterates often signed documents with a St. Andrew’s cross of X and kissed that X to show their good faith (as they did with any cross or the Bible), which reinforced the association. But these explana- tions may be folk etymology, as may the story that mathemati- cally the X is a “multiplier”—in this case of love and delight. |
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英语词源词典收录了13259条英语词源词条,基本涵盖了全部常用英语词汇的起源、历史,是研究英语词汇或通过词源学英语的必备工具。