This is the 711th most frequent Icelandic word.
sunnan
"Southward" or "from the south."
In this sentence, 'sunnan' indicates the wind's direction relative to the south.
Vindurinn blæs sunnan.
The wind blows from the south.
Here, 'sunnan' is used with a preposition to describe a location relative to a point, meaning 'south of'.
Við bjuggum sunnan við fjallið.
We lived to the south of the mountain.
In this instance, 'sunnan' describes a specific characteristic or position aligned with the south side.