←
Faroese súrur (cognate)
←
Proto-Germanic *sūraz (inherited)
←
Proto-Indo-European *súHros (derived)
←
Norwegian sur (cognate)
←
Old Norse súrr (inherited)
→
Luxembourgish sauer (cognate)
→
Norwegian Bokmål sur (cognate)
→
Norwegian Nynorsk sur (cognate)