The word "navvy" is a shortened form of the term "navigator", which originally referred to a person responsible for building or maintaining navigable waterways, such as canals or rivers. In the early 19th century, many Irish laborers were employed in building Britain's canal systems, and they became known as "navigators". Over time, the term evolved into "navvy". The word has since become more generalized and is commonly used to describe any manual laborer involved in construction work, particularly those working on infrastructure projects.