Trúfesti

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

trúfesti

f. faithfulness, firmness in faith.

Possible runic inscription in Younger Futhark:ᛏᚱᚢᚠᛁᛋᛏᛁ

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