Writers often use “rancor” to evoke a deep, lingering animosity that permeates personal interactions and even historical events. In dialogue, characters may explicitly renounce their bitterness—as when someone declares, “Come, let us put aside all rancor and talk pleasantly” ([1])—or reveal their concealed hostility that drives their actions and attitudes ([2]). In narrative descriptions, the word encapsulates both the intensity of personal vendettas and the broader, seething undercurrents of dispute, as seen when historical conflicts and personal betrayals alike are suffused with a sense of predestined retribution ([3], [4]). Additionally, authors sometimes contrast acts done without bitterness ([5], [6]), highlighting how the presence or absence of rancor markedly influences character dynamics and the unfolding of events.