Krakka

As defined by the Cleasby & Vigfusson Old Norse to English dictionary:

krakka

að, to emit a cracking sound, to simmer.

Possible runic inscription in Younger Futhark:ᚴᚱᛅᚴᚴᛅ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements