This is the 555th most frequent Armenian word.
հետաքրքիր
Interesting.
In this sentence, 'հետաքրքիր' is used as an adjective to describe the book.
Այս գիրքը շատ հետաքրքիր է:
This book is very interesting.
Here, 'հետաքրքրում' (related to 'հետաքրքիր') is used as a verb to express interest in science topics.
Ինձ հետաքրքրում է գիտության թեմաները:
I am interested in science topics.
In this context, 'հետաքրքիր' is again used as an adjective, but this time to describe a story, emphasizing its engaging nature.