To prohibit or forbid. To deny. To contest and endeavor to defeat a claimor demand made against one in a court of justice. Boehmer v. Irrigation I)ist., 117 Cal.19, 48 Pac. 908. To oppose, repel, or resist.In covenants of warranty in deeds, it means to protect, to maintain or keep secure,to guaranty, to agree to indemnify.