咬定牙根

Explanation: Endure pain and insist in the end, or will firm. 　　Source: Ming Shinai "Water Margin" sixty-sixth back to Li Kui whole body peeling off, insist the root, hand Double Axes, flying from the city of Ho in the kill over. " 　　Examples: Public providers are Yufu, after listening to his words, ~ refused to agree. ★ Qing Li Baojia "A Short History of Civilization," the thirty-second back