1. the quality or state of being brutal; savage, cruel, or violent behavior or character
2. the quality of being coarse, crude, or lacking refinement; animal-like or primitive behavior

Examples

• The brutishness of the attack shocked the entire community.
• His brutishness and lack of manners made him unwelcome at formal dinners.
• The film depicted the brutishness of war in unflinching detail.
• She was appalled by the brutishness of his language and behavior.
• The brutishness of the regime was condemned by international observers.
• Despite his wealth, his brutishness revealed a lack of true education.