The phrase "leaves high and dry" means to abandon someone in a difficult or helpless situation. Some antonyms for this phrase could include "supports," "aids," "guides," "helps," "rescues," or "saves." These words convey ideas of assistance, protection, and support. Other antonyms could include "stays by one's side," "sticks around," or "remains faithful," which suggest loyalty and commitment to helping someone in need. Overall, there are many antonyms for "leaves high and dry" that can convey the opposite meaning of support and assistance, emphasizing the importance of being there for others in difficult times.