‘恕難從命’ is a formal, highly polite phrase used to decline a request—especially one made by someone of higher status or in official, professional, or ceremonial contexts. Literally, it breaks down as: 恕 (shù, 'to forgive' or 'I beg your pardon'), 難 (nán, 'difficult'), 從 (cóng, 'to comply with' or 'to follow'), and 命 (mìng, 'order' or 'instruction'). Together, it conveys deep respect and regret: 'I sincerely apologize, but I find it impossible to comply with your request.'

This expression carries strong humility and deference, often implying that the refusal is due to principle, prior commitment, inability, or ethical constraint—not unwillingness. It’s common in written correspondence, business negotiations, academic settings, or when declining invitations from superiors. While grammatically a verb phrase, it functions as a fixed, idiomatic refusal formula—never used in casual speech among peers or friends.