The phrase "off feet" implies a state of being unable to stand, walk, or move on one's own volition. The antonyms for this phrase would include "standing," "upright," "stable," and "steady." These words all suggest a state of balance, security, and independence. Alternatively, the antonyms for "off feet" may also include phrases such as "in motion," "on the go," and "energized." These words connote a sense of activity, forward momentum, and vitality. By considering these antonyms, we gain a fuller understanding of the diverse range of physical states and movements that are possible for human beings.