presenteeism

[ prez-uh n-tee-iz-uh m ]
/ ˌprɛz ənˈti ɪz əm /

noun

the practice of coming to work despite illness, injury, anxiety, etc., often resulting in reduced productivity.
the practice of working long hours at a job without the real need to do so.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for presenteeism

presenteeism

/ (ˌprɛzənˈtiːɪzəm) /

noun

the practice of persistently working longer hours and taking fewer holidays than the terms of one's employment demand, esp as a result of fear of losing one's job

Word Origin for presenteeism

C20: a play on absenteeism
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012