The term "stayed line" typically describes a rope or cable that is tensioned or secured to prevent movement. Antonyms for this term could include words like "unsecured," "loose," "unrestrained," "free," or "unfettered." These words all suggest a lack of control or restraint, in contrast to the implied stability of a "stayed line." Additionally, antonyms like "moving," "fluid," or "flexible" suggest a degree of dynamism or adaptability that is absent from a "stayed line." These antonyms offer a range of alternative connotations and implications that may be useful in certain contexts, depending on the desired tone or message of the communication.