What does the idiom ‘‘Tooth and nail’’ mean?

What does the idiom ‘‘Tooth and nail’’ mean? Correct Answer with utmost effort

Terrible অর্থ ভয়ঙ্কর। Pleasantly অর্থ আনন্দদায়কভাবে; সানন্দে। Awfully অর্থ অত্যন্ত; অত্যধিক; ভীষণ Tooth and nail (প্রাণপণে চেষ্টা করা)ঃ He tried tooth and nail for the position.

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