retarlo

to challenge him/it, to dare him/it

→ retar
verb · singular Rare #47,471
to challenge him/it, to dare him/it The ending “-lo” means “him” or “it,” depending on context.
SP: Voy a retarlo a una carrera.
EN: I'm going to challenge him to a race.
Conjugation of retar
retarlo

Mary no se habría atrevido a retarlo.

Mary wouldn't have dared to challenge him.

Alguien vino a retarlo.

Someone came to challenge him.

— Ip Man (2008)

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)