This is the 3014th most frequent Turkish word.
arabası
"His/her/its car."
In this sentence, 'arabası' means 'his/her/its car', referring specifically to Ali's possession, as indicated by the possessive suffix 'ı' and the proper noun Ali.
Ali'nin arabası yeni.
Ali's car is new.
Here, 'arabası' again signifies possession ('his/her/its car'), with the context not immediately specifying to whom it belongs, thus being inferred.
Arabası garajda park edilmiş.
His/her/its car is parked in the garage.
'Arabası' here specifies 'his/her/its car', particularly clarifying that this specific one does not belong to the mentioned owner.