This is the 13572nd most frequent Turkish word.
kullanmış
"Used" or "has/have used."
Here, 'kullanmış' is in the past perfect tense, indicating that the action of use was completed with a specific purpose.
O, eski kitabını geri dönüşüm için kullanmış.
He used his old book for recycling.
In this sentence, 'kullanmış' is used in a speculative form in the past, asking about the frequency of use.
Bu aracı ne kadar sıklıkla kullanmış olabilir?
How often could he have used this vehicle?
In this example, 'kullanmış' indicates completion of the action with a specific result, showing certainty in past usage.