Through sheer effort (a fuerza de)

A fuerza de with Nouns

To express that a goal was achieved through intense effort or repetition, use a fuerza de ("by dint of" or "through sheer"). It is often followed by nouns related to hard work, such as empeño (determination), perseverancia (perseverance), or tesón (tenacity).

By dint of determination, we have improved a lot this year.
A fuerza de empeño, hemos mejorado mucho este año.
Through sheer tenacity, the musicians polished the sound.
A fuerza de tesón, los músicos pulieron el sonido.

A fuerza de with Infinitives

To focus on the specific action repeated to master a skill or overcome an obstacle, pair a fuerza de directly with an infinitive.

By dint of practicing, he masters the new skill.
A fuerza de practicar, domina la nueva habilidad.
The great merit is achieving mastery by dint of repeating.
El gran mérito es alcanzar la maestría a fuerza de repetir.

Flexible Placement

Place a fuerza de at the beginning of a sentence to emphasize the effort, or at the end to focus on the final result.

The artist perfected his art through sheer tireless work.
El artista perfeccionó su arte a fuerza de trabajo incansable.
I have polished the technique by dint of training.
He pulido la técnica a fuerza de entrenar.