This is the 6723rd most frequent Russian word.
sj
The term "sj" isn't a Russian word or common abbreviation. It might be a typo or misinterpretation—please clarify further.
In this sentence, 'спать с книгой' figuratively means to dedicate time to closely studying or being involved with something, showcasing an idiomatic usage.
У меня был сложный выбор, и я решил спать с книгой.
I had a difficult choice, and I decided to sleep with the book.
Here, 'с' indicates an instrumental case usage, connecting the noun 'очами' (eyes) to the action of looking, representing the means by which the action is performed.
Давайте с очами оглядим вокруг.
Let us look around with our eyes.
In this context, 'с' indicates accompaniment or combination, showing that tea comes with sugar as an additive.