This is the 644th most frequent Chinese word.
家里
"At home" or "in the house."
In this sentence, '家里' refers to 'inside the house where I live'.
我家里有一只猫。
There is a cat in my house.
In this sentence, '家里' denotes 'at home as a location'.
他总是在家里看书。
He always reads books at home.
Here, '家里' signifies the 'environment and atmosphere of my home'.