This is the 4979th most frequent Turkish word.
getirirken
"While bringing" or "as bringing."
Here, 'getirirken' is used to convey the action of bringing happening concurrently with some instruction.
Kitapları bana getirirken onları dikkatlice taşı.
While bringing me the books, carry them carefully.
In this case, 'getirirken' emphasizes the act of concurrently bringing water during an action.
Okula giderken ve su getirirken acele etmelisin.
You should hurry when going to school and bringing water.
The use of 'getirirken' here combines actions occurring together with an advisory statement.