An ungrateful person is someone who fails to appreciate or acknowledge the efforts, favors, or kindness shown to them by others. Synonyms for an ungrateful person can include phrases such as an "ingrate," "thankless individual," "unappreciative person," or a "self-centered ingrate." These individuals tend to lack the ability to empathize with others and may often take for granted the help or support they receive. Other related synonyms may include "arrogant," "selfish," or "egotistical," as these words can reflect the ungrateful person's lack of concern for others and their own personal interest at the expense of others. It is important to maintain a positive attitude towards others and to show appreciation for the good deeds and gestures shown to us by others.