This is the 3776th most frequent Russian word.
чужого
"Someone else's" or "foreign."
In this sentence, 'чужого' refers to something that belongs to someone else, emphasizing ownership.
Не трогай чужого без разрешения.
Do not touch someone else's without permission.
Here, 'чужого' emphasizes the ethical principle of not taking others' property.
Он никогда не брал чужого.
He never took what belongs to others.
In this context, 'чужого' is used figuratively to refer to matters that are not ours or are related to others.