Úsynju

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

úsynju

adv. without foresight, unwisely.

Possible runic inscription in Younger Futhark:ᚢᛋᚢᚾᛁᚢ

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