This is the 12824th most frequent Turkish word.
içeriden
"From inside" or "from within."
The word 'içeriden' is used to indicate an action taking place from within a space or location, in this case, locking the door from the inside.
Kapıyı içeriden kilitledik.
We locked the door from the inside.
In this sentence, 'içeriden' refers to the origin of the sounds as being inside a place.
Sesler içeriden geliyor.
The sounds are coming from inside.
Here, 'içeriden' is used to describe the viewpoint or location of the observers, indicating they are inside and looking out or observing from that position.