As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
- a. without effect, vain; fara at erendislausu, to go on a fool’s errand.
Possible runic inscription in Younger Futhark:ᛁᚱᛁᚾᛏᛁᛋᛚᛅᚢᛋᛋ
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This headword also appears in dictionaries of other languages closely related to Old Icelandic.