Allbeiskr

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

allbeiskr

a. very harsh, bitter.

Possible runic inscription in Younger Futhark:ᛅᛚᛚᛒᛁᛁᛋᚴᚱ

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