What is the abstract noun for refuse?

The noun 'waste' is an abstract noun as a Word for an act of expending something carelessly, extravagantly, or to no purpose; a Word for a concept (a waste of time, a waste of resources).

The noun 'waste' is a concrete noun as a Word for material that is not wanted; the unusable remains or byproducts of something; a Word for physical things.

The abstract noun form of the verb to waste is the gerund, wasting.

A related abstract noun is wastefulness.