This is the 16739th most frequent Turkish word.
yüzlerini
"Yüzlerini" means "their faces."
In this sentence, 'yüzlerini' is the accusative plural possessive form of 'yüz' (face). It indicates that each child washed their own face.
Çocuklar yüzlerini yıkadıktan sonra kahvaltıya oturdular.
The children sat down for breakfast after washing their faces.
Here, 'yüzlerini' refers to plural possessive form 'their faces,' used as the direct object where students are drawing images of their own faces.
Resim dersinde öğrenciler yüzlerini kâğıda çizmeyi denediler.
In art class, the students tried drawing their faces on paper.
In this usage, 'yüzlerini' indicates that the faces being shaded belong to 'they,' conveying possession and direct object usage.