There are many synonyms for the phrase "lost time", each of which carries a slightly different connotation. Some common alternatives to lost time include wasted time, idle time, unproductive hours, and squandered moments. These phrases may be used to describe periods of time that were not used to accomplish anything, either due to laziness, distraction, or unforeseen circumstances. Another related term is downtime, which can refer to time spent waiting or resting between tasks, but may also describe periods of inactivity or malfunction in a larger system. Regardless of the specific phrasing used, the concept of lost time often carries a sense of regret or loss, as though an opportunity has been missed.