belonging to times long past especially of the historical period before the fall of the Western Roman Empire; "ancient history"; "ancient civilizations such as those of the Etruscans and Sumerians"; "ancient Greece"
involving or likely to cause controversy; "a central and contentious element of the book"- Tim W.Ferfuson
inclined or showing an inclination to dispute or disagree, even to engage in law suits; "a style described as abrasive and contentious"; "a disputatious lawyer"; "a litigious and acrimonious spirit"