What does the word impugn mean?

Usage examples for impugn

  1. Thus, though he was after his religious oscillations nominally an orthodox Protestant, the tendency of his works was to impugn points held by Protestants and Catholics alike, and though he was nominally a Cartesian, he was equally far from yielding an implicit belief to the doctrines of Descartes. – A Short History of French Literature by George Saintsbury
  2. And if you exceed what I have done for Lucretia, unless, on more dispassionate consideration than I can give, you conscientiously think me wrong, you insult my memory- and impugn my justice. – Lucretia, Complete by Edward Bulwer-Lytton
  3. Mind you well, I do not mean to impugn Geordie's sincerity in the last appeal; not for one moment, for I believe implicitly that Geordie, in the very heart of him, meant to do well. – St. Cuthbert's by Robert E. Knowles
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