This is the 435th most frequent Vietnamese word.
sách
"Book."
Here, "sách" is used to mean 'books,' referring to objects meant for reading.
Tôi thích đọc sách vào buổi sáng.
I like to read books in the morning.
In this sentence, "sách" continues to mean 'books,' emphasizing the kind or quality of the books being referred to.
Thư viện này có rất nhiều sách hay.
This library has many interesting books.
"Sách" here represents a single book, used by specifying with the quantifier "cuốn" and describing with the adjective 'famous.'