Harden



GRE TOEFL 考研

解释

GRE 红宝书

• v. 变硬, 变坚强
• ［英］ v. 变硬, 变坚强 ( cause sth to become hard)
• ［类］ ripen : maturity / harden : solidity ( 使成熟结果是成熟 / 硬化结果是坚硬) 反义词: macerate ( 浸软)
• ［例］ The varnish takes a few minutes to harden.

Webster Collegiate

verb (hardened; hardening)

• Date: 13th century
• transitive verb
  • 1. to make hard or harder
  • 2. to confirm in disposition, feelings, or action; especially to make callous <hardened his heart>
  • 3.
    • a. inure, toughen <harden troops>
    • b. to inure to unfavorable environmental conditions (as cold) — often used with off<harden off seedlings before transplanting>
  • 4. to protect from blast, heat, or radiation (as by a thick barrier or placement underground)
• intransitive verb
  • 1. to become hard or harder
  • 2.
    • a. to become firm, stable, or settled
    • b. to assume an appearance of harshness or severity <her face hardened at the thought>
  • 3. to become gradually acclimatized to unfavorable conditions — often used with off<plants hardened off before the first frost>

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