The opposite of "boosted morale" could be seen as a negative impact on employee wellbeing. From feeling unmotivated to lacking job satisfaction, decreased morale may lead to a decrease in productivity and increased turnover. Some possible antonyms for "boosted morale" could be phrases such as "dejected spirits," "low morale," or "dispirited and demotivated." It is crucial for companies to recognize the importance of employee morale and invest in tactics to improve it, from regular recognition and appreciation to creating a positive company culture. By boosting morale, companies can improve employee engagement, increase retention rates, and ultimately drive business success.