Geysi-

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

geysi-

very, exceedingly; g. mikill, very great; g. margir, very many, g. illa, very badly.

Possible runic inscription in Younger Futhark:ᚴᛁᚢᛋᛁ-

Also available in related dictionaries:

This headword also appears in dictionaries of other languages closely related to Old Icelandic.

• Old Norse - Cleasby & Vigfusson Dictionary
• Old Norwegian - Johan Fritzner's Dictionary