leverage (n.)youdaoicibaDictYouDict[leverage 词源字典]
1724, "action of a lever," from lever (n.) + -age. Meaning "power or force of a lever" is from 1827; figurative sense from 1858. The financial sense is attested by 1933, American English; as a verb by 1956. Related: Leveraged; leverages; leveraging.[leverage etymology, leverage origin, 英语词源]