This is the 94th most frequent Indonesian word.
ini
"This" or "these."
In this sentence, 'ini' functions as a demonstrative adjective, modifying the noun 'buku' (book) to specify which book the speaker is referring to.
Buku ini sangat menarik.
This book is very interesting.
Here, 'ini' acts as a demonstrative pronoun, standing on its own to refer to an object or concept that is near to the speaker.
Ini adalah rumah saya.
This is my house.
In this example, 'ini' specifies the noun 'barang' (item) as a demonstrative adjective, emphasizing the particular object being referred to.