The phrase "booting out" means to eject or remove someone or something forcefully. Antonyms for this phrase would be terms like welcoming, including, retaining, or inviting. These opposites denote a sense of hospitality, inclusion, and hospitality, rather than aggressive exclusion. "Welcoming" refers to the act of greeting someone warmly and making them feel at ease. "Including" means to embrace and incorporate someone or something into a group or collective, while "retaining" implies keeping someone or something in place without forcibly removing them. Finally, "inviting" connotes a sense of invitation and openness, which is the opposite of the idea of "booting out.