This is the 14136th most frequent Spanish word.
titánica
Extremely large, powerful, or heroic in effort or scale.
In this sentence, "titánica" is used as an adjective to describe a task that is monumental in scale and effort, emphasizing its enormity and the considerable amount of work required.
La construcción de la muralla china fue una tarea titánica.
The construction of the Great Wall of China was a titanic task.
Here, "titánico" highlights the immense human effort and determination, relating to someone striving for greatness with significant challenges.
Su esfuerzo titánico durante el maratón fue admirable.
His titanic effort during the marathon was admirable.
The word "titánico" in this context expresses the demanding mental and creative energy needed to achieve such an endeavor, signifying a great intellectual challenge.