The word "忿恨" is formed by combining two characters: "忿" is composed of "分" (meaning to divide) atop "心" (heart/mind), indicating a state of agitated anger or resentment, while "恨" is composed of "忄" (a variant of "心") alongside "艮" (meaning to stop or limit), suggesting a deep-seated, lingering hatred. Together, they create a compound word where "忿" conveys immediate, outburst-like indignation and "恨" contributes a sense of enduring animosity, resulting in a meaning of intense resentment and hatred.