the.com/boy

means A young male human, typically a child or adolescent, not yet grown into manhood.

from Genuinely murky — one of English's great etymological mysteries. It surfaces in Middle English as 'boi' or 'boy,' meaning a male servant or commoner of low rank, sometimes even a rascal or knave. Where it came from before that is unclear; suggestions include links to Old French 'embuié' (fettered, i.e. a servant or slave) or Germanic words for 'brother,' but none are confirmed. By the 14th century it had softened and widened to simply mean a young male child, shedding most of its servant-class baggage along the way.