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"
distribute according to a plan or set apart for a special purpose; "I am allocating a loaf of bread to everyone on a daily basis"; "I'm allocating the rations for the camping trip"