This is the 2436th most frequent Arabic word.
كتابه
"His book" or "its book" (depending on context).
The word 'كتابه' here means 'his book,' combining 'كتاب' (book) with the possessive suffix 'ه' (his). It shows ownership.
قرأت كتابه خلال الإجازة.
I read his book during the vacation.
In this sentence, 'كتابه' again means 'his book,' referring to a specific book that belongs to him.
أعجبني تصميم كتابه الجديد.
I liked the design of his new book.
The word 'كتابه' once more denotes 'his book,' indicating possession and emphasizing the content of the book.