to challenge him/it, to dare him/it
Mary no se habría atrevido a retarlo.
Mary wouldn't have dared to challenge him.
El suficiente, quizá, para retarlo.
Enough, perhaps, to challenge him.
— El señor de los anillos: El retorno del rey (2003)
Seguro que al retarlo le ha impresionado mucho.
I'm sure he was very impressed when I challenged him.
— El club de los poetas muertos (1989)