Undir-alda

Meaning of Old Norse word "undir-alda"

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

undir-alda

u, f. an under-wave, the undertow of a wave.

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