The phrase "busts in" typically means to enter a room or conversation abruptly and rudely. Some antonyms for this phrase include "enters politely," "knocks before entering," "waits for an invitation," or "introduces oneself respectfully." These terms imply a courteous and gracious demeanor, showing an understanding of social etiquette and proper interaction with others. Such actions can make the other person feel respected and valued, fostering positive relationships and healthier communication. It is important to be mindful of our behavior towards others and have a sense of self-awareness to avoid causing offense, misunderstanding, or unnecessary conflict.