Allþykkr

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

allþykkr

a. very thick; féllu þeir allþykkt, in great numbers.

Possible runic inscription in Younger Futhark:ᛅᛚᛚᚦᚢᚴᚴᚱ

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