What is another word for un-thankfulness?
Pronunciation: [ˈʌnθˈaŋkfə͡lnəs] (IPA) 
Un-thankfulness refers to a lack of gratitude or appreciation, and its synonyms include ingratitude, ungratefulness, thanklessness, and lack of thanks. Ingratitude suggests a disregard for the benefits received from someone or something. Ungratefulness implies an inability or unwillingness to acknowledge the value or worth of what one has. Thanklessness implies neglecting to express appreciation or acknowledgment for what has been done. Lack of thanks refers to a failure to say or show appreciation for what one has received. Whatever the synonym used, the message is clear that a lack of thankfulness is regarded as a negative and unhealthy attitude.
