1. the quality of showing no mercy, pity, or compassion; cruelty

Examples

• The dictator’s mercilessness toward his enemies was well documented.
• She criticized the mercilessness of the new company policy.
• The storm struck with complete mercilessness, destroying everything in its path.
• His mercilessness in business negotiations earned him many enemies.
• The judge was known for the mercilessness of his sentences.
• The mercilessness of the desert climate made survival difficult.