This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. A state of ineffective utilization.

"But they were protesting when the retirement age was kept at 53 years of age and when civil servants, who were already underworked and overpaid, wanted more year after."

underworked    underworking   

underworked    underwrought    underworking   

undermine