The word "abjure" means to renounce or give up something. It implies a voluntary act of consciously rejecting or abandoning a belief, behavior, or allegiance. It is different from "to allow," which means to give permission, "to make up," which means to create or invent, and "to play," which means to engage in an activity for enjoyment or competition. Therefore, the correct answer is "to renounce or give up."