labourer
This term carries a strong association with grit, physical endurance, and the working class. It describes a role defined by muscle and sweat rather than specialized certification or academic training. In a social context, it often evokes the image of the industrial era or large-scale infrastructure projects where raw human effort is the primary tool. While a worker is a generic term for anyone employed, a labourer is specifically someone whose value is tied to their physical capacity. It is frequently used in legal or economic contexts to categorize the lowest tier of the employment hierarchy, though in a historical sense, it honors the foundational effort required to build civilizations.
Countable when referring to an individual person hired for a job, such as hiring ten labourers for the harvest.