A quick definition of de injuria:

De Injuria: A legal term that means "of injury." It refers to a formal denial of a factual allegation made in the opposing party's pleading. In a trespass action, a traverse de injuria denies the defendant's excuse for the wrong done. A traverse can be a common traverse, cumulative traverse, general traverse, or special traverse. A common traverse is an express denial of a particular allegation in the opposing pleading in the terms of the allegation, accompanied by a tender of issue or formal offer of the point denied for trial. A cumulative traverse analyzes a proposition into its constituent parts and traverses them cumulatively. A general traverse is a denial of all the facts in an opponent's pleading. A special traverse is a denial of one material fact in an opponent's pleading and explains or qualifies the denial.