“Darg” is a Scots dialect term, meaning “a day’s work.” It comes from the Middle English “dawerk” or “daywork,” stemming from the Old English “dægweorc,” from “dæg,” meaning “day,” and “weorc,” meaning “work.” It’s used in the same sense as someone saying with satisfaction, “You put in a good day’s work today.” However, the original usage was to negotiate payment. Someone would offer a certain amount of money for a darg of work — the worker would know exactly how much money they were going to get for the work agreed upon.