barbarious is an archaic variant of barbarous, from Latin barbarus, from Ancient Greek barbaros ('foreign, non-Greek'), of imitative origin. The path is chiefly one of transmission: an older form is taken into English, with the word's shape and meaning carried through the language names and forms preserved in the history. In modern use, the adjective sense is "barbarous; savage or uncivilized (archaic variant)", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. The wider word family includes related English forms such as barbarian, barbaric, barbarous, barbarity, showing how the same base continues to support neighboring English vocabulary. The principal historical forms in the chain include Latin barbarus, Ancient Greek barbaros, which anchor the explanation in named linguistic material.