Invalid



GRE Barron 考研

解释

GRE 红宝书

• adj. 无效力的
• ［英］ adj. 无效力的 ( not valid; null or void)
• ［记］ in ( 无) +valid ( 有效的) -> 无效的

Webster Collegiate

I. adjective

• Etymology: Latin invalidus weak, from in- + validus strong — more at valid
• Date: 1542
• not valid:
  • a. being without foundation or force in fact, truth, or law <an invalid assumption><declared the will invalid>
  • b. logically inconsequent
• ? invalidly adverb

II. adjective

• Etymology: Latin & French; French invalide, from Latin invalidus
• Date: 1642
• 1. suffering from disease or disability ; sickly
• 2. of, relating to, or suited to one that is sick <an invalid chair>

III. noun

• Date: 1701
• one who is sickly or disabled

IV. transitive verb

• Date: 1787
• 1. to remove from active duty by reason of sickness or disability
• 2. to make sickly or disabled

---