The phrase "get to one's feet" refers to standing up from a sitting or lying position. Antonyms for this phrase include "sink down", "slump", "collapse", "drop", and "sit back down". These words imply a failure or inability to stand up, either due to weakness or fatigue. Other antonyms of this phrase include "remain seated", "stay lying", "stagnate", and "remain motionless". These antonyms suggest a lack of motivation or desire to stand up, or a lack of urgency to do so. The opposite of "getting to one's feet" could also be simply "lying down", "crouching", or "kneeling".