This is the 2600th most frequent Arabic word.
الجيد
"The good" or "excellent."
Here, 'الجيد' is used as an adjective to describe the book's quality with respect to its content.
الكتاب هذا قديم ولكنه جيد من حيث المحتوى.
This book is old, but it is good in terms of content.
In this sentence, 'الجيد' is used to describe the quality of the performance, indicating adequacy and positive evaluation.
كان أداؤه جيدًا في الامتحان الأخير.
His performance was good in the last exam.
Here, 'الجيد' acts as a noun referring to the advantageous aspect of the idea, highlighting its applicability.