La palabra del día: Fallo

Masculine noun. In Legal Spanish, a fallo is a sentence of a judge, an arbitrator or a court, and in it, especially, the decisive or imperative pronouncement. E.g.: El fallo del árbitro será vinculante y podrá ser presentado como sentencia y ejecutado ante cualquier tribunal de jurisdicción competente: The arbitrator’s award shall be binding and may be entered as a judgment and enforceable in any court of competent jurisdiction.
The verb is fallar.
By the way, fallo means also failure and fallar to fail. dc