There are several alternative phrases that can be used in place of "walk off from." Some good synonyms include "depart from," "leave behind," and "move away from." Additionally, "disengage from," "withdraw from," and "remove oneself from" all provide similar meanings. Depending on the context, terms like "cut ties with," "break away from," and "distance oneself from" can also be effective alternatives. Overall, there are several ways to express the act of physically moving away from something or someone, and selecting the best synonym is dependent on the specific circumstance or tone desired.