Skakka

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

skakka

(að), v., s. með mönnum, to aid one against the other (Þorgeirr og Þorgils sóttust lengi, svá at engi ~ði með þeim).

Possible runic inscription in Younger Futhark:ᛋᚴᛅᚴᚴᛅ

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