"act of rendering invalid," 1752, noun of action from invalidate (v.). Perhaps modeled on French invalidation (17c.).
"destroy the strength or validity of, render of no force or effect," 1640s, from invalid (adj.2) + -ate (2). Related: Invalidated; invalidating.
updated on March 06, 2019
英语词源词典收录了45867条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。