Insufficient or inadequate work; tasks that are not completed to the necessary extent.

अपर्याप्त कार्य

English Usage: His underwork in the project led to several important deadlines being missed.

Hindi Usage: परियोजना में उसका अपूर्ण कार्य कई महत्वपूर्ण समय सीमा चूकने का कारण बना।

To not work at the required level or to perform less work than expected.

आवश्यक स्तर पर काम न करना

English Usage: She tends to underwork whenever she feels underappreciated.

Hindi Usage: जिन्हें वह कम सराहना महसूस करती हैं, तब वह आमतौर पर आवश्यक स्तर पर काम नहीं करती।