Good-heartedness refers to the quality of being kind, generous, and considerate towards others. However, there are also antonyms or words that have the opposite meaning of good-heartedness. For instance, meanness, cruelty, and callousness are antonyms of good-heartedness. Meanness is characterized by a lack of generosity and kindness towards others. Cruelty, on the other hand, involves causing unnecessary harm and pain to others. Callousness refers to being insensitive and indifferent to the feelings and well-being of others. These antonyms highlight the negative traits that are the opposite of good-heartedness and can be detrimental to building positive relationships with others.