This is the 322nd most frequent Icelandic word.
vestra
"Vestra" means "westward" or "in the west" in English.
Here, 'vestra' is used to indicate direction, meaning 'to the west' in an adverbial form.
Ég mun ferðast vestra í sumar.
I will travel west this summer.
In this sentence, 'vestra' is used to describe location from a general perspective, meaning 'in the west' as an adverb.
Við heimsóttum fallegasta bæinn vestra.
We visited the most beautiful town in the west.
Here, 'vestra' serves the purpose of specifying the origin or location, translating as 'in the west' or 'from the west' in context.