Ýgjast

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

ýgjast

(ð), v. refl. to grow vicious, of a bull (graðungrinn tók at ~).

Possible runic inscription in Younger Futhark:ᚢᚴᛁᛅᛋᛏ

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