The word "un-feelingnesses" refers to a lack of empathy or emotional responsiveness. Some synonyms for this word include callousness, hardness of heart, insensitivity, coldness, and indifference. These words describe individuals who show little regard for the feelings or well-being of others. Other synonyms include aloofness, apathy, detachment, and unresponsiveness. People who exhibit un-feelingnesses may lack the ability to connect with others on an emotional level and may seem uncaring or distant. These negative traits can be harmful in personal and professional relationships and can lead to isolation and loneliness. It is important to practice empathy and compassion towards others.