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GRE 蓝宝 Barron TOEFL


[编辑] 解释

[编辑] GRE 红宝书

  • n. 树液, 活力; v.消弱, 耗尽
  • [英] n. 树液, 活力 ( vigor; vitality) ; v.消弱, 耗尽 ( weaken; exhaust)
  • [类] 反义词: bolster ( 支持) ; fortify ( 支持)
  • [例] The country was sapped by social decay.

[编辑] Webster Collegiate

I. noun

  • Etymology: Middle English, from Old English s?p; akin to Old High German saf sap
  • Date: before 12th century
  • 1.
    • a. the fluid part of a plant; specifically a watery solution that circulates through a plant's vascular system
    • b.
      • (1) a body fluid (as blood) essential to life, health, or vigor
      • (2) bodily health and vigor
  • 2. a foolish gullible person
  • 3. \[probably short for sapling\] blackjack, bludgeon
  • ? sapless adjective
  • ? saplessness noun

II. transitive verb (sapped; sapping)

  • Date: 1725
  • 1. to drain or deprive of sap
  • 2. to knock out with a sap

III. verb (sapped; sapping)

  • Etymology: Middle French sapper, from Old Italian zappare, from zappa hoe
  • Date: 1598
  • intransitive verb
    • to proceed by digging a sap
  • transitive verb
    • 1. to subvert by digging or eroding the substratum or foundation ; undermine
    • 2.
      • a. to gradually diminish the supply or intensity of <sapped her strength>
      • b. to weaken or exhaust the energy or vitality of <the illness sapped him of his stamina>
    • 3. to operate against or pierce by a sap
  • Synonyms: see weaken

IV. noun

  • Etymology: French sape, from saper
  • Date: 1642
  • the extension of a trench to a point beneath an enemy's fortifications

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