Erendislauss

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

erendislauss

a. without effect, vain; fara at erendislausu, to go on a fool’s errand.

Possible runic inscription in Younger Futhark:ᛁᚱᛁᚾᛏᛁᛋᛚᛅᚢᛋᛋ

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