The antonyms for the word "shows kindliness" are numerous and can be described as displaying cruelty, indifference, unkindness, meanness, harshness, unfriendliness, hostility, coldness, callousness, and selfishness. Individuals who exhibit a lack of kindness might be unresponsive to others' needs, unwilling to assist or help, or even go out of their way to hurt or demean others. Such behaviors can lead to negative outcomes, such as increased conflict, decreased productivity, and lower levels of happiness and well-being. Therefore, it is important for individuals to embrace kindness and treat others with respect, empathy, and compassion, regardless of differences in opinions, beliefs or values.