怨尤 is a classical two-character noun meaning 'blame' or 'resentment', often directed toward others or fate for perceived injustice or misfortune. The first character 怨 (yuàn) conveys deep grievance, bitterness, or grudge; the second 尤 (yóu) intensifies this feeling, suggesting 'especially' or 'particularly' — together they express pointed, morally charged resentment, typically in formal, literary, or reflective contexts.

This word appears frequently in essays, historical narratives, and philosophical discussions, especially when describing reactions to unfair treatment, societal hardship, or personal loss. It carries a slightly solemn, elevated register — not used in casual speech. Unlike everyday words like 抱怨 (to complain), 怨尤 implies deeper moral judgment and emotional weight, often reflecting helplessness or resignation rather than active protest.