Ákveðinn

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

ákveðinn

pp. fixed, appointed; ákveðin orð, marked, pointed words; með ákveðnum orðum, in express words.

Possible runic inscription in Younger Futhark:ᛅᚴᚢᛁᚦᛁᚾᚾ