decisive
US /dɪˈsaɪ.sɪv/
UK /dɪˈsaɪ.sɪv/

1.
decisivo, resolutivo
having or showing the ability to make decisions quickly and effectively
:
•
A decisive leader is essential in times of crisis.
Un líder decisivo es esencial en tiempos de crisis.
•
She is known for her decisive actions.
Es conocida por sus acciones decisivas.
2.
decisivo, concluyente
settling an issue; producing a definite result
:
•
The goal proved to be the decisive moment in the match.
El gol resultó ser el momento decisivo del partido.
•
The evidence was decisive in proving his guilt.
La evidencia fue decisiva para probar su culpabilidad.