板上钉钉 (bǎn shàng dìng dīng)

📖 Today's 成语: 板上钉钉 (bǎn shàng dìng dīng) Meaning: Driving a nail into a board (a done deal / set in stone) Summary: 板上钉钉 (bǎn shàng dìng dīng) is used to emphasize that a decision, fact, or agreement is completely finalized and cannot be altered. The visual image of a nail driven into a board suggests a permanent fixture that is difficult to remove, representing absolute certainty in daily conversation or business contexts. Read the full transcript with multilingual translations, meaning/usage notes, examples, and cultural context:板上钉钉 (bǎn shàng dìng dīng) | 每天成语