Røkr

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

røkr

n. twilight; ragna r., the twilight of the gods, the end of the world = ragna rök.

Possible runic inscription in Younger Futhark:ᚱᚢᚴᚱ

Also available in related dictionaries:

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

• Old Norse - Cleasby & Vigfusson Dictionary