The word "most drifting" can be interpreted in multiple ways depending upon the context. However, some antonyms that can be used for this phrase may include "stable," "anchored," "fixed," "immovable," "grounded," or "secure." These words represent the opposite meaning of "most drifting" and can be used to describe something that is firmly established or grounded in a particular place or situation. While "most drifting" may imply being carried away by external factors, using these antonyms can help to convey a sense of stability and steadfastness in a given context.