Old Norse undra

← Proto-Germanic *wundrōną (inherited)

← Proto-Germanic *wundrą (mention)

← Proto-Indo-European *wenh₁- (root)

← Proto-Indo-European *wenh₁- (derived)

← Old Norse undr (mention)

→ Danish undre (derived)

→ Norwegian Nynorsk undrast (mention)

→ Swedish undra (derived)