noun, feminine/ondoˈnada/plural: hondonadas
low valley, gully, rift valley
“Reunirse en Atocha, para subir luego a dar el ataque a las tropas monárquicas, o esperarlas en aquella hondonada, parecíame a mí una gran pifia. Pero no me atreví a contradecir a los militares.” — Joining up in Atocha, then going on to attack the pro-monarchic troops, or waiting for them in that depression, seemed to me a great error. But I dared not contradict the soldiers.
From hondo + -nada.