Fullnumi

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

fullnumi

a. having learnt fully, become an adept in a thing (~ í göldrum).

Possible runic inscription in Younger Futhark:ᚠᚢᛚᛚᚾᚢᛘᛁ

Also available in related dictionaries:

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

• Old Norwegian - Johan Fritzner's Dictionary