boarder

The word 'boarder' is built upon the noun 'board', which originates from the Old English 'bord', meaning a plank or a table. By the late Middle English period, 'board' had evolved to signify the table where meals were served, and subsequently, the food itself and the act of regularly supplying meals and accommodation for payment. The agent suffix '-er', of ancient Germanic origin, is then attached to create a noun denoting a person who receives such services. Thus, the literal "person associated with receiving meals and lodging" directly reflects the modern definitions of a lodger or a resident pupil at a school.

Structure: board (to provide/obtain meals and lodging) + er (agent noun suffix) - board: From Old English 'bord' (plank, table), later developing the sense of a table where food is served, and by extension, the food itself and the act of providing meals and lodging. In this word, it functions as the core root conveying the concept of provision of meals and lodging. - er: A native English agent noun suffix from Old English '-ere', derived from Proto-Germanic. It denotes a person who performs an action or is associated with something. Here, it forms a noun meaning "a person who receives board."