This is the 2299th most frequent German word.
innern
"To internalize" or "to bring into the interior."
Here, 'innern' serves as the dative form of 'innen', emphasizing the interior location of the house.
Im innern des Hauses herrschte Ruhe.
Inside the house, there was calm.
The adjective 'innern' describes the feelings, pertaining to internal or emotional aspects.
Man kann die innern Gefühle eines Menschen nicht leicht erkennen.
One cannot easily discern a person's inner feelings.
In this instance, 'innern' conveys an internal or introspective action, focusing on inner mental processes.