The phrase "keep at arm's length" means to avoid getting too close to someone or something. Antonyms for this phrase would be "embrace," "empathize," "engage," "embrace," or "involve." These words suggest a willingness to connect, understand, and interact with others instead of keeping them at a distance. For example, instead of keeping someone at arm's length, you might invite them in, listen to their perspective, and work collaboratively to find common ground. While keeping at arm's length may be necessary in certain situations, it's important to use these antonyms to build relationships and create meaningful connections with others.