hardhearted . hardhearted {adj.} Unsympathetic; merciless. Jack is so hardhearted that even his own children expect nothing from him. Categories: add yours add yours children {adj.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: H Subscribe to: American Idioms► Also consider the parent subscriptions (3)Idioms feedEnglish languageHome page and general feed Discuss Discuss