hurdle
A. -noun (Sport) valla (f) (figurative)   oneselfáculo (m), barrera (f)
·the 100m hurdles
(=race) los 100 metros vallas
·the high hurdles
·las vallas altas
a. to fall at the first hurdle fracasar a las primeras de cambio, no superar el primer escollo
B. -compound
·hurdle race -noun carrera (f) de vallas