Berjast

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

berjast Old Icelandic word can mean:

berjast

v. refl. to fight (við e-n, with or against a person; við veðr, against bad weather; við e-m, for a person);

berjast

~ á e-t, to assail attack (~ á borgina, á guðs lýð);

berjast

þótt hann berðist lengi mót (offered resistance).

Possible runic inscription in Younger Futhark:ᛒᛁᚱᛁᛅᛋᛏ