to doubt it, to hesitate
Robert Oppenheimer y que si pudiera hacerlo de nuevo, él lo haría sin dudarlo.
Robert Oppenheimer said that if he could do it again, he would do it without hesitation.
— Oppenheimer (2023)
Si hubiera tenido dinero suficiente, habría comprado esa casa sin dudarlo.
If I had had enough money, I would have bought that house without hesitation.