What are the opposite words for more thankworthy?

More thankworthy means highly deserving of gratitude or appreciation. Some of the antonyms for this word could be ungrateful, unworthy, unappreciated or undeserved. Ungrateful describes a person who does not appreciate what they have received or have been given. Unworthy refers to something or someone who is not deserving of recognition or appreciation. Unappreciated is used to indicate that something or someone is not valued as they should be. Undeserved means that something has been given or received without merit or justification. It is important to remember that everyone deserves to be appreciated, but not everything can be described as more thankworthy.