This is the 17505th most frequent Russian word.
трëх
The word "трëх" is the genitive singular form of "три" (three) in Russian and means "of three."
The word 'трёх' is used to modify 'подруг', indicating the number of friends (three) in the genitive plural form.
Мы купили три платья для трёх подруг.
We bought three dresses for three friends.
The word 'трёх' is used to indicate a time span (three hours), taking the genitive case to show the completion of the time period.
После трёх часов ожидания мы наконец вошли.
After three hours of waiting, we finally entered.
The word 'трёх' is used to modify 'стульев', indicating the number of chairs (three) in the genitive plural form, implying the chairs were standing (existence) in the room.