The antonyms for the word "didst kindness" are selfishness, cruelty, meanness, unkindness, brutality, heartlessness, indifference, and aggression. To not "didst kindness" is to show disregard for others' feelings, to act with callousness and to intentionally cause pain or harm. This behavior can stem from a lack of empathy, compassion, and understanding towards others. Choosing to not "didst kindness" can have a negative impact not only on those around us but also on ourselves. It is important to cultivate empathy and kindness towards others, as this can lead to a more positive and fulfilling life experience.