This is the 124th most frequent Hebrew word.
שלושה
The Hebrew word "שלושה" means "three" (masculine form).
The word 'שלושה' in this sentence is used as a number (three) to designate the quantity of books (masculine word).
אני אקנה שלושה ספרים בחנות.
I will buy three books in the store.
Here, 'שלושה' indicates the quantity of dogs (masculine word) possessed.
יש לנו שלושה כלבים בבית.
We have three dogs at home.
In this example, 'שלושה' describes the number of friends (masculine plural noun) who performed the action.