Torþreytiligr

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

torþreytiligr

a. difficult to perform.

Possible runic inscription in Younger Futhark:ᛏᚢᚱᚦᚱᛁᚢᛏᛁᛚᛁᚴᚱ

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