grandnephew

The word 'grandnephew' is a transparent compound formed within English. The prefix 'grand-', borrowed from Latin via French, was adopted into English to denote a generational step in familial relationships, as seen in 'grandfather' and 'grandson'. It was systematically combined with the existing English word 'nephew', which itself descends from the Latin 'nepos', a term with a broader original meaning of 'descendant' or 'grandson'. The compound's logic is directly descriptive, literally meaning a "great nephew," specifying a nephew's son, thus extending the lineal kinship terminology by one generation in a clear and analogical pattern.

Structure: grand (great) + nephew (son of sibling's child) - grand: From Latin 'grandis' (great, large, full-grown). In English, it functions as a prefix indicating a relationship one generation removed. - nephew: From Old French 'neveu', from Latin 'nepos, nepot-' (grandson, nephew, descendant). In English, it denotes the son of one's sibling or sibling-in-law.