exhaustion

This term describes a total depletion of energy or resources, carrying a heavy connotation of finality and emptiness. When applied to humans, it suggests a point of collapse where the body or mind can no longer function, distinguishing it from simple tiredness or fatigue through its intensity.

In a resource context, it refers to the permanent disappearance of a supply. Because it is an uncountable noun in both its physical and resource-based senses, it does not take a plural form and cannot be counted as individual units.