This is the 9192nd most frequent Turkish word.
vadisinin
"Vadisinin" means "of the valley" or "the valley’s" in English.
'Vadisinin' is used in the genitive case to indicate possession, meaning 'of the valley'.
Kapadokya vadisinin eşsiz manzarasını seyrettik.
We watched the unique scenery of the Cappadocia valley.
Here, 'vadisinin' again shows possession, referring to 'its valley'.
Vadisinin etrafında birçok antik kalıntı bulunur.
Many ancient ruins are found around its valley.
In this sentence, 'vadisinin' describes 'of the mysterious valley' with a genitive possession structure.