The phrase "brought to knees" typically refers to a situation where someone or something is brought to a weakened or vulnerable state, often due to a powerful force or circumstance. Antonyms, or opposites, of this phrase could include "strengthened," "empowered," "resilient," "unbowed," or "undaunted." These words all convey a sense of inner strength and resilience in the face of difficulty, rather than a sense of being defeated or overcome. By choosing to use these antonyms instead of the typical phrase, one can express a sense of optimism and determination in the face of adversity.