What is the word for to wear away slowly

erode means to wear away slowly

I think erode is the word your looking for but these are some other words    

diminish, lessen, pare, shave, trim, carve, chip, consume, decrease, fashion, form, hew, model, mold, sculpt, shape, undermine, eat away, and wear away

all fossil fuels are nonrenewable, so think coal, gasoline, things that we will eventually run out of. all fossil fuels are nonrenewable resources, but not all nonrenewable recourses are fossil fuels. these resources are not being renewed as fast as we are using them. i hope this considering there weren't any answer choices.