The phrase "keeps at arm's length" refers to avoiding closeness or intimacy with someone or something. Antonyms of this phrase include "embraces," "welcomes," and "embraces wholeheartedly." If you embrace someone, you eagerly welcome them and seek closeness. If you welcome someone, you invite them to be a part of your life and maintain a close relationship with them. Similarly, if you embrace something wholeheartedly, you show enthusiasm and give your full support to it. Other antonyms for "keeps at arm's length" include "engages with," "connects with," and "deepens relationships with," which all involve actively pursuing closer connections with others.