This is the 8274th most frequent Swedish word.
armarna
"Armarna" in English means "the arms."
Here, 'armarna' refers to the arms of the speaker being extended.
Jag sträckte ut armarna för att nå boken.
I stretched out the arms to reach the book.
In this sentence, 'armarna' describes the sleeves of a sweater, showing a non-literal usage of the term.
Armarna på min nya tröja är alldeles för långa.
The arms of my new sweater are far too long.
This usage of 'armarna' clearly refers to the physical arms used to perform an action.