Noah Webster's Dictionary (v. t.) To contradict; to deny; to controvert; to dispute; to forbid. Int. Standard Bible Encyclopedia GAINSAY gan-sa, gan'-sa (anteipon, antilego, "to say or speak against"): Occurs as anteipon, "not. able to withstand or to gainsay" (Luke 21:15); as antilego, "a disobedient and gainsaying people" (Romans 10:21); APC 2Esdras 5:29, contradicebant; APC Judith 8:28, anthistemi; APC Judith 12:14, antero; Additions to Esther 9:13, antitasso; APC 1Macc 14:44, anteipon. Gainsayer, antilego (Titus 1:9, "exhort and convince (the Revised Version (British and American) "convict") the gainsayers"). Gainsaying, antilogia (Jude 1:11, "the gain-saying of Korah"); antilogia is Septuagint for meribhah (Numbers 20:13); anantirrhetos, "without contradiction" (Acts 10:29, "without gainsaying"). The Revised Version (British and American) has "gainsaid" for "spoken against" (Acts 19:36); "not gainsaying" for "not answering again" (Titus 2:9); "gainsaying" for "contradiction" Hebrews 12:3). W. L. Walker

Multi-Version Concordance Gainsay (1 Occurrence) Luke 21:15 For I will give you a mouth and wisdom, which all your adversaries shall not be able to gainsay nor resist. (KJV ASV WBS)