This is the 644th most frequent Persian word.
قطعا
Certainly; absolutely; definitely.
In this sentence, 'قطعا' is used to express certainty regarding the statement made about having read the book.
قطعا من این کتاب را خواندهام.
Certainly, I have read this book.
Here, 'قطعا' emphasizes certainty and encouragement towards the listener's ability to perform the task.
قطعا تو میتوانی این کار را انجام دهی.
Surely, you can do this work.
In this context, 'قطعا' conveys confidence in the outcome provided a specific condition is met.