Antonyms for "while away hours" refer to actions that do not involve using time idly or purposelessly. Instead of "while away hours," one may use "productively spend time," "maximize time utilization," "accomplish meaningful tasks," or "focus on important priorities." These antonyms imply useful, constructive activity that leads to achieving a goal. Other antonyms include "shorten time," "expedite tasks," "finish efficiently," and "streamline processes," which denote efforts to complete a task quickly and effectively. In contrast to the passive, time-wasting connotation of "while away hours," the antonyms reflect a proactive, results-oriented outlook that values time as a finite resource.