As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
byrsta Old Icelandic word can mean:
- (-sta, -str), v.
- 1) to furnish with bristles;
- 2) to cover as with bristles; borg gulli byrst, with the gablehead mounted with gold;
- 3) refl., ~st, to bristle up, to show anger.
Possible runic inscription in Younger Futhark:ᛒᚢᚱᛋᛏᛅ