1. the quality or state of being furious; intense anger or rage
2. the quality of being violent, intense, or extreme in force or effect

Examples

• The furiousness of the storm knocked down trees across the region.
• She spoke with such furiousness that everyone in the room fell silent.
• The furiousness of his response surprised even his closest friends.
• The athlete played with furiousness and determination throughout the match.
• The furiousness of the crowd's reaction showed how much they cared about the outcome.
• He expressed his furiousness at the unfair decision by walking off the field.