Eld-borg

Meaning of Old Norse word "eld-borg"

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

eld-borg

f. a volcanic crag, vide borg.

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