noun, masculine/ˈreto/plural: retos
challenge (a difficult task); dare; scolding; insult
“hacer(le) frente a un reto, enfrentar un reto” — to face a challenge
Inherited from Old Spanish repto, rebto, riepto, from Old Spanish rebtar + -o, inherited from Latin reputāre; equivalent to modern retar + -o. Cognate with English repute.