The antonyms for the word "remain firm" can be characterized as vacillation, instability, or wavering. Antonyms for remaining firm can include yielding, bending, crumbling, and conceding. In scenarios where staying firm is crucial, these opposing terms can be seen as a sign of weakness, hesitation or an inability to make a decision. Opposite meanings of remaining firm can also demonstrate a lack of conviction or a lack of a clear objective. However, it is important to keep in mind that situations arise where flexibility, adaptability, and compromise are necessary for positive outcomes, and in those cases, staying firm may not always be the best option.