The word "不忿" is formed by directly combining the character "不", meaning "not" or "no" and acting as a negating prefix, with the character "忿", meaning "anger" or "resentment"; this combination yields a compound meaning of "indignant" or "resentful", specifically denoting anger that arises from perceived injustice or unfairness, where the negation emphasizes a refusal to accept the situation passively.