An expression of cost related to the net demands of heterotrophic individuals on a karil. Can be expressed as an arbitrary assumption (ex: The life-cahrrhan of an individual of a given species,) or a specific measure (the cahrrahn of a single iteration of a resource-consumption/production cycle.) In some cases (becoming more common,) it may be attached as a descriptor or criteria for a tool, process, or product. (Ex: "While the production of powercell components is a high-zhahir right of the Mechanist's Guild, it carries a high cahrrhan that makes it infeasible for many Lords Holder or Charter Reeves to allocate.")