As defined by the Cleasby & Vigfusson Old Norse to English dictionary:
- höfuð-sundl (hǫfuð-sundl)
- n. dizziness in the head.
Orthography: The Cleasby & Vigfusson book used letter ö to represent the original Old Norse vowel ǫ. Therefore, höfuð-sundl may be more accurately written as hǫfuð-sundl.
Possible runic inscription in Younger Futhark:ᚼᚢᚠᚢᚦ-ᛋᚢᚾᛏᛚ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements