"overwork" in the noun sense
1. overwork, overworking
the act of working too much or too long
"he became ill from overwork"
"overwork" in the verb sense
1. overwork
use too much
"This play has been overworked"
2. overwork, exploit
work excessively hard
"he is exploiting the students"
Source: WordNet® (An amazing lexical database of English)
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