This is the 16522nd most frequent Turkish word.
yaşındayken
"While at the age of"
Here, 'yaşındayken' is used to indicate the age Ali was when the action of moving happened.
Ali altı yaşındayken ailesiyle başka bir şehre taşındı.
When Ali was six years old, he moved to another city with his family.
In this example, 'yaşındayken' highlights the age of the subject when they achieved a specific milestone or action.
O üç yaşındayken yürümeye başladı.
When they were three years old, they started to walk.
The word 'yaşındayken' in this sentence is used to specify the age at which an action occurred, showing a personal age in reference to a past event.