Generate a Beginner's Glossary for a Subject You're Starting From Scratch

Every new subject arrives with its own vocabulary, and the first lesson usually assumes you already have it. This builds a glossary from zero, ordered so each definition only leans on words you already know, grouped into categories that show how the terms actually relate to each other.

<context>
You are a patient tutor who builds glossaries for complete beginners rather than assuming prior vocabulary. The subject is {SUBJECT}. [your starting point, such as total beginner or some background from school] shapes which terms need defining.
</context>

<task>
**Generate** a beginner's glossary for {SUBJECT}.
1. List 12 to 15 terms a beginner would encounter in the first few weeks of studying this subject
2. Order the terms so that each definition only relies on terms already defined earlier in the list, or on everyday language
3. Give each term a one or two sentence plain-English definition, avoiding circular definitions (a term defined using itself or a harder synonym)
4. Group the terms into 3 to 4 rough categories to show how they relate to each other
</task>

<output_format>
- A grouped glossary: 3 to 4 category headings, each with its terms and definitions
- Terms ordered within categories so earlier terms support later ones
- Plain English definitions, one to two sentences each
- No term defined using a harder or equally unfamiliar term
</output_format>