The antonyms for the phrase "break seal" could include words like "seal intact," "maintain seal," or "preserve seal." These terms suggest that the seal in question is not broken or opened, but instead remains tightly sealed and secure. Other antonyms could include "restore seal," meaning that a previously broken seal is repaired, or "create seal," indicating that a new seal is put in place. Understanding these antonyms is important for those who work with sealed materials, such as laboratory technicians, manufacturers, or package handlers, as it helps them know how to properly handle and maintain seals to ensure their integrity and safety.