Learner's definition of OVERTAX
to make (someone or something) do more than that person or thing is able to do or should do
to make heavy demands on (someone or something)
New housing development in the town will overtax sewer and drinking water systems.
We are afraid the trip might overtax his health/strength.
The children overtaxed her patience.
The hospital's overtaxed emergency room needs more doctors.
to make (people) pay too much in taxes