Old Norse ó-

→ Old English un- (cognate)

→ Faroese ó- (inherited)

→ Westrobothnian åovörn (derived)

→ Icelandic ó- (inherited)

→ Norwegian Bokmål u- (mention)

→ Norwegian Bokmål uforsonlig (mention)

→ Norwegian Bokmål uforsonlighet (mention)

→ Norwegian Nynorsk u- (mention)

→ Old Norse ólifnaðr (prefix)

→ Swedish o- (mention)