This is the 17128th most frequent Turkish word.
çökertildiğini
"That it has been collapsed" or "that it has been brought down."
The word 'çökertildiğini' is used as a passive adjective indicating the condition of the fortress after being attacked.
Kale düşman saldırısıyla çökertildiğini öğrendi.
The fortress was learned to have been demolished during the enemy attack.
Here, 'çökertildiğini' is used to describe that the plans were actively dismantled and provides emphasis on the action.
Düşmanın planlarının çökertildiğini bilim adamı kanıtladı.
The scientist proved that the enemy's plans were dismantled.
The usage of 'çökertildiğini' signifies a past event where the bridge was deliberately collapsed.