Antonyms for the word "most nobleminded" would refer to individuals lacking in moral character, kindness, or generosity. These could include synonyms such as small-minded, selfish, uncharitable, malicious, or cruel. Individuals who exhibit such qualities lack the empathy and selflessness to behave in a noble fashion. Antonyms could also include shallow, petty, insincere, dishonest, or greedy. People who are not noble-minded tend to prioritize their own interests over others and may be deceitful or manipulative in their actions. Such individuals are generally looked down upon in society, and their actions are not considered noble or commendable.