1. the quality or state of being argumentative, quarrelsome, or prone to dispute
Usage: uncountable noun; often used to describe a person's temperament or behavior in discussions
2. the quality of being disputed, debated, or controversial
Usage: uncountable noun; refers to a topic or issue rather than a person

Examples

• His contentiousness made it difficult for the team to reach decisions without conflict.
• The contentiousness of the political issue divided the community into opposing camps.
• She was known for her contentiousness in meetings, always ready to challenge proposals.
• The contentiousness surrounding climate policy has only intensified in recent years.
• His natural contentiousness meant he rarely accepted advice without argument.
• The contentiousness of the border dispute has lasted for decades.