overwork

v. 1 (cause to) work too hard. 2 weary or exhaust with too much work. 3 (esp. As overworked adj.) Make excessive use of (an overworked phrase). 4 (as overworked adj.) = *overwrought 2. n. Excessive work.

v. t. To work beyond the strength; to cause to labor too much or too long; to tire excessively; as, to overwork a horse.