The word "most battling" can be interpreted in a variety of ways, but generally refers to someone or something that is fighting hard, determined or struggling to overcome an obstacle. The antonyms for this phrase would be peaceful, relaxed, and calm. These words carry a sense of ease and lack of struggle. They embody a feeling of tranquility and serenity, rather than one of conflict and tension. Other antonyms for "most battling" could include "docile," "compliant," "uninhibited," and "complacent." These words all communicate a sense of contentment and a lack of need to fight against anything.