Sofa

As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):

sofa

(sef; svaf, sváfum; sólinn), v. to sleep; s. af um nóttina, to sleep the night through; s. fast, to sleep hard, soundly; s. lífi, to sleep one’s life away; fig. to be dormant.

Possible runic inscription in Younger Futhark:ᛋᚢᚠᛅ

Also available in related dictionaries:

This headword also appears in dictionaries of other languages closely related to Old Icelandic.

• Old Norse - Cleasby & Vigfusson Dictionary
• Old Norwegian - Johan Fritzner's Dictionary