1. the quality or state of lacking enthusiasm, commitment, or sincere effort
Usage: uncountable; formal

Examples

• The team's halfheartedness in the second half cost them the game.
• Her halfheartedness about the project was evident in the rushed work she submitted.
• The manager criticized the staff's halfheartedness during the training session.
• Despite his halfheartedness, he managed to pass the exam.
• The halfheartedness of their response suggested they didn't care about the outcome.
• She approached the task with such halfheartedness that it took twice as long to complete.