Hrúðra

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

hrúðra

að, to become crusted, of sores.

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