This is the 92nd most frequent Icelandic word.
innan
"Within" or "inside."
Here, 'innan' is used as a preposition meaning 'inside' to describe a place within a boundary or enclosure in this context.
Innan hússins er fallega skreyttur salur.
Inside the house, there is a beautifully decorated hall.
Here, 'innan' denotes inclusion in a specific group or collective, emphasizing her being part of it.
Hún er innan hópsins sem var valinn.
She is within the group that was chosen.
In this sentence, 'innan' expresses a time frame constraint, indicating a task's completion is bounded by a specific time.