Efni-mark

Meaning of Old Norse word "efni-mark"

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

efni-mark

n. a sign, 732. 17.

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