The antonyms for "upgraded" can be "downgraded," "demoted," or "degraded." These words suggest a decrease in quality or status rather than an improvement. A downgrade may refer to a reduction in the grade of something or the lowering of someone's status, authority or reputation. A demotion implies someone being moved to a lower rank or position, often due to poor performance. Degradation suggests a loss of quality, value or condition, often leading to a deterioration or decline. Therefore, knowing antonyms for upgraded can help individuals understand the different stages of progression and decline when judging the worth of something.