This is the 11051st most frequent Spanish word.
dudarlo
"To doubt it."
The context emphasizes certainty despite having the concept of doubt in 'dudarlo'.
No puedo dudarlo, esta es la mejor elección.
I can't doubt it, this is the best choice.
The sentence suggests hesitation or questioning of the situation using 'dudarlo'.
Pareció dudarlo antes de aceptar la propuesta.
He seemed to doubt it before accepting the proposal.
Here, 'dudarlo' implies a process of questioning or re-evaluating a statement or belief.