To declare false; deny. See Synonyms at deny.(verb-transitive)
To oppose, especially by contradiction.(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "gainsay" in a sentence
"Indeed, I have offended and done evil; but I crave pardon of Allah Almighty for whatso I did, and if He reunite us, I will never again gainsay thee in aught, no, never! —"
"a proof of my assertion, which I do not think any of them will gainsay, which is, that they all laid down as a principle what they did not perfectly know."
"In theory, at least, inferior material, but who can gainsay the wine's elegance?"