This is the 18th most frequent Icelandic word.
vegna
"Vegna" means "because of" or "due to" in English.
Here, 'vegna' is used to indicate causation, translated as 'due to' or 'because of' in English.
Ég kom of seint vegna veðurs.
I arrived late due to the weather.
In this sentence, 'vegna' shows a relation or causation pointing to the individuals being a factor for the result.
Vegna ykkur var veislan frábær.
Because of you, the party was excellent.
In this context, 'vegna' illustrates the reason behind avoiding certain actions.