Þrúðigr

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

þrúðigr

a. strong; powerful, mighty.

Possible runic inscription in Younger Futhark:ᚦᚱᚢᚦᛁᚴᚱ

Also available in related dictionaries:

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

• Old Norse - Cleasby & Vigfusson Dictionary