lever

名词 n. 动词 v. 副词 adv.
中文释义
英 /ˈliː.və/    美 /ˈlɛv.ɚ/|/ˈli.vɚ/|/ˈliː.və/

英文释义

名词 n.
  1. A rigid piece which is capable of turning about one point, or axis (fulcrum), and in which are two or more other points where forces are applied; — used for transmitting and modifying force and motion.
  2. A levee. rare
    — We do not appear at Phœbus's Levér.
  3. A rigid piece which is capable of turning about one point, or axis (fulcrum), and in which are two or more other points where forces are applied; — used for transmitting and modifying force and motion.; Specifically, a bar of metal, wood or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.
    — Retractable steps and handrails are provided on each side of the cars. The steps, which are under the control of the guard, are operated by hand levers in the entrance vestibule.
  4. A small such piece to trigger or control a mechanical device (like a switch or a button).
  5. A bar, as a capstan bar, applied to a rotatory piece to turn it.
    — A doorknob of whatever roundish shape is effectively a continuum of levers, with the axis of the latching mechanism—known as the spindle—being the fulcrum about which the turning takes place.
  6. An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
  7. A crowbar. obsolete
    — My lord, I brained him with a lever my neighbour lent me, and he stood by and cried, ‘Strike home, old boy!’
动词 v.
  1. To move with a lever. transitive
    — With great effort and a big crowbar I managed to lever the beam off the floor.
  2. To use, operate or move (something) like a lever (physically). figuratively,transitive
    — Sullen now, with stultified spleen, Mrs Dibble grappled her crutches and levered herself upright after an ungainly struggle.
  3. To use (something) like a lever (in an abstract sense). figuratively,transitive
    — He was a man who levered his way from small-time communist hack to political power by tapping into the most potent vein of historical juice in the Balkans: nationalism.
  4. To increase the share of debt in the capitalization of a business. UK
    — "The equity holders want you to 'lever up,' use as much debt as you can," said David Stanley, chairman of Kansas City-based Payless Cashways,
副词 adv.
  1. Rather. not-comparable,obsolete
    — Now therfore take my life from me / for I had leuer dye then liue.

词形变化

levers plural levers present,singular,third-person levering participle,present levered participle,past levered past liever alternative levers plural

词汇关系

近义词
jimmy
衍生词
back lever beer lever delever exolever front lever lever action lever arm leverless leverman lever shears microlever multilever pull a lever ratchet lever reversing lever shift lever side-lever tuning lever underlever compound lever gear lever leverage lever escapement lever frame lever jack lever watch thrust lever tire lever tyre lever universal lever
相关词
alleviate elevator elevate leaven levant levator levitator levitate

词源

词源 1
From Middle English lever, levore, levour, from Old French leveor, leveur (“a lifter, lever (also Old French and French levier)”), from Latin levātor (“a lifter”), from levō (“to raise”). Doublet of levator.
词源 2
From Middle English lever, comparative of leve, leef (“dear, beloved, lief”), equivalent to lief + -er. Related to German lieber (“rather”).
词源 3
Etymology tree
French leverbor.
English lever
Borrowed from French lever.
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