1. The quality or state of being merciless; lack of compassion or pity; extreme harshness or cruelty.
Usage: Plural form of mercilessness; Abstract noun; typically used in formal or literary contexts

Examples

• The mercilessnesses of war left deep scars on the survivors.
• History records the mercilessnesses of various tyrants and despots.
• The novel explores the mercilessnesses of nature in the Arctic wilderness.
• Critics condemned the mercilessnesses displayed by the invading forces.
• The documentary revealed the mercilessnesses of the industrial system toward workers.