The antonym of "dost one part" is "stay together." This phrase implies a sense of unity and togetherness, as opposed to separation or disunity. It is important to stay together in relationships, friendships, and other areas of life in order to maintain strong connections and build trust. When people "stay together," they are confident in their ability to face challenges and overcome obstacles as a team. In contrast, when people "dost one part," they are essentially breaking apart or distancing themselves from others, which can lead to feelings of isolation and a lack of support. Therefore, it is advisable to choose "stay together" over "dost one part.