Trolla-hlað

Meaning of Old Norse word "trolla-hlað"

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

trolla-hlað

n. a troll’s building, Cyclopic works, a giant’s causeway.

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