seriousness(state of being serious) noun [UK: ˈsɪə.rɪə.snəs] [US: ˈsɪ.riə.snəs]
gravedadnoun {f}As the days passed by, we began to understand the seriousness of the matter. = A medida que pasaban los días, comenzábamos a comprender la gravedad del problema.
seriedadnoun {f}John soon realized the seriousness of his error. = John luego comprendió la seriedad de su error.