Frum-tunga

Meaning of Old Norse word "frum-tunga"

As defined by the Cleasby & Vigfusson Old Norse to English dictionary:

frum-tunga

u, f. original tongue.

Possible runic inscription in Younger Futhark:ᚠᚱᚢᛘ-ᛏᚢᚾᚴᛅ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements