This is the 13359th most frequent Turkish word.
kiralarken
"While renting" or "when renting."
Here, 'kiralarken' is used in a temporal sense to indicate the timing of being cautious.
Ev kiralarken dikkatli olmalısın.
You should be careful when renting a house.
The word 'kiralarken' indicates the time during which insurance should be considered, implying an action to be taken contemporaneously.
Araba kiralarken sigorta yaptırmayı unutmayın.
Don't forget to get insurance while renting a car.
In this sentence, 'kiralarken' serves to provide context for the action of considering different options, showing simultaneous actions.