Old Norse stǫðugr

← Proto-Indo-European *steh₂- (root)

← Old Norse staðr (suffix)

← Old Norse ugr (suffix)

→ Danish stadig (derived)

→ Westrobothnian ostödu (inherited)

→ Icelandic stöðugur (inherited)

→ Norwegian Bokmål stadig (derived)

→ Norwegian Bokmål stødig (derived)

→ Norwegian Nynorsk stadig (derived)

→ Norwegian Nynorsk stødig (derived)

→ Old Norse stǫðugleikr (suffix)