Annotate (verb)

1. To add notes or comments to a text or document, typically for the purpose of explanation or clarification.
2. To provide critical or explanatory notes or comments on a text or document.

Origin:

From the latin annotare, from the prefix ad- meaning "to" and notare meaning "to note".

Examples:

1. The teacher asked the students to annotate the text to show their understanding of the concepts.
2. The researcher had to annotate all the scientific papers to make sure the information was accurate.
3. Annotating a book can help you remember important points and understand the author's arguments.
4. The students were asked to annotate the textbook to prepare for the exam.
5. The annotated version of the book had additional information and comments from the editor.