This is the 4423rd most frequent Turkish word.
altısı
"Altısı" means "six of them" in English.
Here, 'altısı' indicates 'six of them,' referring to six individuals collectively.
Altısı birden aynı anda geldi.
All six of them came at the same time.
In this sentence, 'altısı' specifies six items (books) out of a group.
Bu kitaplardan altısı ödünç alındı.
Six of these books were borrowed.
Here, 'altısı' denotes that six individuals within the described group share the same status as being new members.