Guess the word by the explanation of its meaning. 1) prepared
2) the first meal of the day
3) a book that teaches somebody about a subject
4) not simple
5) to write once again

1) The word for "prepared" is "ready." When we say something is prepared, it means it is ready to use or to do a particular task. For example, if you have all your materials and are ready to start a presentation, you are prepared.

2) The word for "the first meal of the day" is "breakfast." Breakfast is the meal that you have in the morning when you wake up. It is important to have a healthy breakfast to fuel your body and give you energy for the day.

3) The word for "a book that teaches somebody about a subject" is "textbook." A textbook is a book that students use to learn about different subjects in school. It contains information and explanations to help students understand and study the topic.

4) The word for "not simple" is "complicated." When something is complicated, it means it is difficult to understand or deal with. It may have many parts or steps that need to be understood or completed to solve a problem or complete a task.

5) The word for "to write once again" is "rewrite." When we rewrite something, it means we write it again, either to make improvements or to create a new version. For example, if you write a draft of an essay and then make changes to it to create a final version, you are rewriting it.

To summarize, the words for the given explanations are as follows:
1) prepared - ready
2) the first meal of the day - breakfast
3) a book that teaches somebody about a subject - textbook
4) not simple - complicated
5) to write once again - rewrite