Syfja

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

syfja

(að), v. impers., e-n ~r, one gets sleepy; ~ðr, sleepy.

Possible runic inscription in Younger Futhark:ᛋᚢᚠᛁᛅ

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