Un-thanking refers to a lack of gratitude or appreciation. In the corporate world, un-thanking can lead to dissatisfaction and reduced productivity among employees. Some synonyms for un-thanking include ungrateful, unappreciative, unthankful, and thankless. These words all describe a person who fails to acknowledge the efforts of others or take notice of the good things they have. Other words that can be used as synonyms for un-thanking include insensitive, unfeeling, and uncaring. These words all describe a person who lacks empathy and fails to recognize the importance of the people around them. In the end, un-thanking can be harmful to relationships, both personal and professional, and it is important to recognize its negative effects.