Cavalierism refers to a sense of superiority or arrogance; thus, antonyms for this word would include humility, modesty, or deference. Words like kindness, compassion, and thoughtfulness also serve as antonyms since they all denote qualities of considerate behavior. Other antonyms might include selflessness, altruism, or empathy, as these words describe a sense of nurturing, caring, or concern for others. In contrast to the cavalierism's disregard for the consequences of one's actions, antonyms such as responsibility, attentiveness, and prudence would emphasize the importance of acting wisely and taking ownership of one's actions. Ultimately, any word that denotes a sense of dignity or modesty can serve as an antonym for cavalierism.