Úmjúkr

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

úmjúkr

a. ‘unsoft’, harsh (~ í orðum).

Possible runic inscription in Younger Futhark:ᚢᛘᛁᚢᚴᚱ

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