This is the 2252nd most frequent Japanese word.
詳しく
"詳しく" means "in detail" or "thoroughly."
The word '詳しく' is used as an adverb, meaning 'in detail', to describe the manner of explaining.
彼はその問題について詳しく説明した。
He explained the issue in detail.
Here, '詳しく' functions as an adverb to modify the verb '扱う', indicating the detailed nature of the coverage.
この本は日本の歴史を詳しく扱っています。
This book covers Japanese history in detail.
In this usage, '詳しく' modifies '知る' to express the desire for a detailed understanding or knowledge.