Undirförull

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

undirförull

a. dealing underhand, false.

Possible runic inscription in Younger Futhark:ᚢᚾᛏᛁᚱᚠᚢᚱᚢᛚᛚ

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