This is the 13107th most frequent Turkish word.
karpuzun
"The watermelon’s" (possessive form of "karpuz").
In this sentence, 'karpuzun' is used as the possessive form of 'karpuz' (watermelon), indicating possession ('karpuzun rengi' - 'the watermelon’s color').
Karpuzun rengi kırmızıdır.
The watermelon’s color is red.
Here, 'karpuzun' shows possession of taste, as 'karpuzun tadı' means 'the taste of the watermelon'.
Karpuzun tadı çok güzel.
The taste of the watermelon is very pleasant.
In this example, 'karpuzun' demonstrates possession again, relating to the price ('karpuzun fiyatı' - 'the watermelon’s price').