Þjóðsterkr

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

þjóðsterkr

a. very strong.

Possible runic inscription in Younger Futhark:ᚦᛁᚢᚦᛋᛏᛁᚱᚴᚱ

Also available in related dictionaries:

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

• Old Norse - Cleasby & Vigfusson Dictionary