reckonable

"Reckonable" is not a common everyday word now, but its meaning is fairly clear once you look at the verb behind it. It comes from "reckon," which has long meant to count, calculate, estimate, or settle accounts. So when something is "reckonable," it is something that can be reckoned: it can be counted, measured, calculated, or included in a formal total.

Imagine someone sorting wages, debts, taxes, or years worked toward a pension. Some items belong in the calculation, and some do not. The ones that properly count are reckonable. In that sense, the word often points to things that are valid for the purpose of a sum, record, or official account. A period of service might be reckonable for benefits. A charge might be reckonable in the final cost. An amount might be reckonable because it can be clearly worked out.

The word can also carry the simpler idea of "calculable" or "measurable." If something is reckonable, it is not vague or beyond counting; it is the kind of thing you can put into numbers or include in a running total. That is the heart of the word.

Because "reckon" also means "think" or "suppose" in some kinds of English, it is easy to assume that "reckonable" means "believable" or "reasonable." But that is usually not the main sense. The stronger and more accurate meaning is tied to counting, calculation, and inclusion in an account. So if a thing can be properly counted in, worked out, or entered in the total, it is reckonable.