/ ˌəʊvəˈwɜːk; NAmE ˌoʊvərˈwɜːrk/ verb , noun
■ verb
to work too hard; to make a person or an animal work too hard :
[ v ]
You look tired. Have you been overworking?
[ vn ]
She overworks her staff.
■ noun
[ U ] the fact of working too hard :
His illness was brought on by money worries and overwork.