As defined by the Cleasby & Vigfusson Old Norse to English dictionary:
- u, f. twilight, Lat. crepusculum (cp. morginskæra, dawn, aurora), Sighvat (in a verse).
Possible runic inscription in Younger Futhark:ᛅᛒᛏᛅᚾ-ᛋᚴᛅᚱᛅ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements