Proto-Germanic
[ proh-toh-jer-man-ik ]
/ ˌproʊ toʊ dʒərˈmæn ɪk /
noun
the unattested prehistoric parent language of the Germanic languages; Germanic.
adjective
of or relating to Proto-Germanic.
British Dictionary definitions for proto-germanic
Proto-Germanic
noun
the prehistoric unrecorded language that was the ancestor of all Germanic languages