Þarfleysu-

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

þarfleysu-

in compounds, useless, mischievous (þarfleysuerendi, þarfleysuforvitni, þarfleysuglens, þarfleysuhugsan, þarfleysutal, þarfleysuupphlaup).

Possible runic inscription in Younger Futhark:ᚦᛅᚱᚠᛚᛁᚢᛋᚢ-