Enneagram glossary: key terms from A to Z
Short answer
This Enneagram glossary defines 40 common terms in plain language, from wing and center to instinct, passion, tritype and RHETI. Each entry has a one-line definition below and its own page covering where the term comes from, how it is used, an example and whether research has tested it. Most Enneagram vocabulary describes tradition rather than established findings.
How to use this glossary
Enneagram conversations move fast and assume a lot of vocabulary. Someone writes "sp/so 6w5, line to 3" and expects you to follow. This page collects the terms you are most likely to meet in books, workshops, forums and test results, and gives each one a single plain sentence. Click through for the longer version, which always separates what teachers describe from what studies have found.
Enneagram terms, A to Z
| Term | One-line definition |
|---|---|
| Alignment score | EnneaFox's descriptive 0 to 100 summary of how strongly you endorsed each type's statements. |
| Basic desire | What each type is said to want most; the positive mirror of its core fear. |
| Big Five and the Enneagram | How Enneagram type scores line up with the five research-based personality traits. |
| Center of intelligence | One of three ways of taking in life (gut, heart, head), each holding three types. |
| Core fear | The deep worry a type is said to organize itself around avoiding. |
| Core motivation | The underlying drive, desire plus fear, that defines a type more than behavior does. |
| Countertype | The one subtype of a type whose surface behavior seems to run against the usual portrait. |
| Disintegration | Older name for moving along the line of stress toward a connected type. |
| Ego fixation | Ichazo's original term for the mental trap at each point; also used as a synonym for type. |
| Enneagram | A nine-pointed figure, and the nine-type personality model built on it. |
| Enneagram of personality | The full name for the type model, separating it from the older symbol. |
| Enneagram test | A questionnaire that estimates a best-fit type from your answers. |
| Enneagram type | One of nine numbered patterns, each defined by a core motivation and core fear. |
| Enneagram vs MBTI | Nine motivational types compared with sixteen preference-based types. |
| Fixation | The habitual thought pattern of a type, such as resentment for 1 or planning for 7. |
| Gut triad | Types 8, 9 and 1, said to share a charged relationship with anger and control. |
| Harmonic groups | Types grouped by how they respond to problems: positive outlook, competency, reactive. |
| Head triad | Types 5, 6 and 7, said to share a concern with fear, uncertainty and security. |
| Heart triad | Types 2, 3 and 4, said to share a concern with image, worth and shame. |
| Holy idea | The clear perception each type is said to have lost, opposite its fixation. |
| Hornevian groups | Assertive (3, 7, 8), compliant (1, 2, 6) and withdrawn (4, 5, 9) types. |
| Instinct | One of three basic drives (sp, so, sx) said to steer where attention goes. |
| Instinctual stacking | The order of your three instincts, such as sp/so or sx/sp. |
| Integration | Older name for moving along the line of growth toward a connected type. |
| Levels of health | The range from healthy to unhealthy expression within any one type. |
| Line of growth | The connection a type is said to follow when secure, such as 1 toward 7. |
| Line of stress | The connection a type is said to follow under pressure, such as 1 toward 4. |
| Mistyping | Settling on a type that is not your best fit, often by judging behavior over motive. |
| Narrative tradition | Learning the types by hearing people describe their inner lives, often on panels. |
| Object relations groups | Attachment (3, 6, 9), frustration (1, 4, 7) and rejection (2, 5, 8) triads. |
| Passion | The habitual emotional pull of a type, from anger (1) to sloth (9). |
| RHETI | The Riso-Hudson Enneagram Type Indicator, a published forced-choice questionnaire. |
| Self-preservation instinct | The sp drive toward safety, health, comfort and resources. |
| Sexual instinct | The sx or one-to-one drive toward intensity, chemistry and deep bonds. |
| Social instinct | The so drive toward belonging, roles and standing in groups. |
| Subtype | A type combined with its dominant instinct; 27 in all, such as sp 6. |
| Tritype | The idea that you use one preferred type from each center, such as 4-5-8. |
| Typing | The process of identifying a type through reflection, reading, tests or interviews. |
| Virtue | The healthy quality said to replace a type's passion, from serenity (1) to action (9). |
| Wing | One of the two types next to yours on the circle, written as 4w5 or 9w1. |
Where to start if you are new
If the list feels like a lot, read these five first, in this order. Enneagram type explains what the nine numbers mean. Core motivation and core fear explain why the system cares about reasons more than behavior. Center of intelligence groups the nine into three families. Wing explains notation like 4w5. Everything else, lines, instincts, subtypes, passions and the various groupings, makes more sense once those are in place.
Terms grouped by topic
- Structure of the system: Enneagram, Enneagram type, wing, center of intelligence, gut triad, heart triad, head triad, tritype.
- Movement and change: line of stress, line of growth, disintegration, integration, levels of health.
- Instincts: instinct, self-preservation, social, sexual, instinctual stacking, subtype, countertype.
- The inner layer: passion, virtue, fixation, ego fixation, holy idea, core motivation, core fear, basic desire.
- Other groupings: Hornevian groups, harmonic groups, object relations groups.
- Finding your type: typing, mistyping, Enneagram test, RHETI, narrative tradition, alignment score.
- Context and comparisons: Enneagram of personality, Big Five and the Enneagram, Enneagram vs MBTI.
What research says about this vocabulary
In this section
Frequently asked questions
What are the most important Enneagram terms to know?
Start with type, core motivation, core fear, center and wing. With those five you can follow most introductory material. Instincts and lines are the next layer.
Why do Enneagram books use different words for the same thing?
The Enneagram has no single authority. Different teachers developed their own vocabularies, so terms like disintegration and stress point, or body center and gut triad, often mean the same thing.
Are Enneagram terms backed by research?
Mostly not yet. A few ideas, mainly the type scales and their links to the Big Five, have some research support. Wings, lines, centers, instincts and subtypes are largely untested or unsupported.
What does a notation like "sp/so 4w5" mean?
It reads as: instinctual stacking self-preservation then social, core type 4, with a 5 wing. The glossary entries for instinctual stacking and wing explain each piece.
What does "w" mean in Enneagram types?
It stands for wing. In 9w1, the 9 is the core type and the 1 is the neighboring type said to add a secondary flavor.
Sources
- Hook, J. N., Hall, T. W., Davis, D. E., Van Tongeren, D. R., & Conner, M. (2021). The Enneagram: A systematic review of the literature and directions for future research. Journal of Clinical Psychology, 77(4), 865-883. doi:10.1002/jclp.23097