This is the 650th most frequent Icelandic word.
vestan
"Vestan" means "from the west" in English.
Here, 'vestan' indicates direction of the wind's origin, specifically from the west. It is used within a geographic context.
Vindurinn blæs sterkt vestan af fjöllunum.
The wind blows strongly from the west off the mountains.
In this sentence, 'vestan' is used to describe a location relative to the river, meaning to the west of it.
Við fórum í ferðalag vestan við ána.
We took a trip west of the river.
Here, 'vestan' expresses the source or origin of the fish, specifying 'from the west, specifically from the sea.'