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