overwork

 
Pronunciation: /əʊvəˈwəːk/

verb

[with object] (often as adjective overworked)
  • exhaust with too much work: tired, overworked, demoralized staff
  • [no object] work too hard: the doctor advised a complete rest because he had been overworking
  • make excessive use of: our lifts are overworked
  • use (a word or idea) too much and so make it weaker in meaning or effect: ‘Breathtaking’ is an overworked brochure cliché

noun

[mass noun]
  • excessive work: his health broke down under the strain of overwork