
Fight tooth and nail
Visual Imagery
The phrase paints a vivid picture of a person using their teeth and nails, suggesting intense effort or aggression.

During the debate, he fought tooth and nail to defend his point.
Extreme Measures
It implies doing everything possible, sparing no effort, to achieve a goal, almost like a last resort.

To protect her family, she would fight tooth and nail.
Intensity
The phrase reflects a very high level of determination, beyond ordinary effort.

He fought tooth and nail to overcome the obstacles in his way.
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