Sentence:  <WSD>Gruntled</WSD> employees are happy employees. <WSD>Gruntled</WSD> employees like their coworkers. … <WSD>gruntled</WSD> employees like their employers. … So how do you keep your employees <WSD>gruntled</WSD>? 
Meaning of the word marked with <WSD> tags:  Satisfied, pleased, contented. (from 1930s)