Dictionary.com

ennea-

Save This Word!

a combining form meaning “nine,” used in the formation of compound words: enneahedron.

QUIZZES

QUIZ YOURSELF ON THE 12 TYPES OF VERB TENSES!

Loosen up your grammar muscles because it’s time to test your knowledge on verb tenses!
Question 1 of 6
The verb tenses can be split into which 3 primary categories?

Meet Grammar Coach

Write or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing

Meet Grammar Coach

Improve Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of ennea-

<Greek, combining form of ennéanine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

WORDS THAT USE ENNEA-

What does ennea- mean?

Ennea- is a combining form used like a prefix meaning “nine.” It is used in some scientific and other technical terms.

Ennea- comes from the Greek ennéa, meaning “nine.” The Latin counterpart is nōnus, meaning “ninth” and source of the combining form nona-, which you can learn more about in our Words That Use articles for that form.

Examples of ennea-

An enneagon is “a polygon having nine angles and nine sides.” It’s also known as a nonagon.

The first part of the word, ennea-, means “nine.” The -gon portion of the word may also look familiar: it is a combining form meaning “angled” or “angular,” from the Greek gōnía. Enneagon literally translates to “nine-angled.”

Enneagon comes from the Greek enneágōnos, which features the equivalent form of ennea- in the language.

Another word you may have encountered that features ennea- is the Enneagram, a popular psychological model that categorizes human personality into nine types.

What are some words that use or are related to the combining form ennea-?

What are some other forms that ennea- may be commonly confused with?

Break it down!

The combining form -hedron means “face,” in the sense of a face of a geometrical solid figure, i.e., a cube has six faces. How many faces does an enneahedron have?

How to use ennea- in a sentence

FEEDBACK