gain·say (g?n-s??, g?n?s??)tr.v. gain·said (-s?d?, -s?d?), gain·say·ing, gain·says (-s?z?, -s?z?) 1. To declare to be false; deny. See Synonyms at deny.2. To oppose (someone), especially by contradiction: “She was going to fashion the end of her existence in her own way, and in this determination she would not be gainsaid” (Louis Auchincloss).[Middle English gainsayen : gain-, against (from Old English gegn-) + sayen, to say (from Old English secgan; see say).]gain·say?er n.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.gainsay (?e?n?se?) vb, -says, -saying or -said (tr) archaic or literary to deny (an allegation, a statement, etc); contradict[C13 gainsaien, from gain- against + saien to say1] gain?sayer nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014gain?say (?ge?n?se?, ge?n?se?) v.t. -said, -say?ing. 1. to deny; dispute; contradict. 2. to speak or act against; oppose. [1250?1300; Middle English gainsaien; see again, say] gain?say`er, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.gainsayPast participle: gainsaidGerund: gainsayingImperativePresentPreteritePresent ContinuousPresent PerfectPast ContinuousPast PerfectFutureFuture PerfectFuture ContinuousPresent Perfect ContinuousFuture Perfect ContinuousPast Perfect ContinuousConditionalPast ConditionalImperativegainsaygainsayPresentI gainsayyou gainsayhe/she/it gainsayswe gainsayyou gainsaythey gainsayPreteriteI gainsaidyou gainsaidhe/she/it gainsaidwe gainsaidyou gainsaidthey gainsaidPresent ContinuousI am gainsayingyou are gainsayinghe/she/it is gainsayingwe are gainsayingyou are gainsayingthey are gainsayingPresent PerfectI have gainsaidyou have gainsaidhe/she/it has gainsaidwe have gainsaidyou have gainsaidthey have gainsaidPast ContinuousI was gainsayingyou were gainsayinghe/she/it was gainsayingwe were gainsayingyou were gainsayingthey were gainsayingPast PerfectI had gainsaidyou had gainsaidhe/she/it had gainsaidwe had gainsaidyou had gainsaidthey had gainsaidFutureI will gainsayyou will gainsayhe/she/it will gainsaywe will gainsayyou will gainsaythey will gainsayFuture PerfectI will have gainsaidyou will have gainsaidhe/she/it will have gainsaidwe will have gainsaidyou will have gainsaidthey will have gainsaidFuture ContinuousI will be gainsayingyou will be gainsayinghe/she/it will be gainsayingwe will be gainsayingyou will be gainsayingthey will be gainsayingPresent Perfect ContinuousI have been gainsayingyou have been gainsayinghe/she/it has been gainsayingwe have been gainsayingyou have been gainsayingthey have been gainsayingFuture Perfect ContinuousI will have been gainsayingyou will have been gainsayinghe/she/it will have been gainsayingwe will have been gainsayingyou will have been gainsayingthey will have been gainsayingPast Perfect ContinuousI had been gainsayingyou had been gainsayinghe/she/it had been gainsayingwe had been gainsayingyou had been gainsayingthey had been gainsayingConditionalI would gainsayyou would gainsayhe/she/it would gainsaywe would gainsayyou would gainsaythey would gainsayPast ConditionalI would have gainsaidyou would have gainsaidhe/she/it would have gainsaidwe would have gainsaidyou would have gainsaidthey would have gainsaidCollins English Verb Tables © HarperCollins Publishers 2011