Þýðerska

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

þýðerska

f. = þýðverska.

Possible runic inscription in Younger Futhark:ᚦᚢᚦᛁᚱᛋᚴᛅ

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