Lun (Root Word) – Definition, Origin & Examples

04.09.2025 Root words Time to read: 3min

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Lun-01

Root words can be important if you want to know where a word or meaning is coming from. By understanding the origin of a word, it can help you memorize it more easily. For example, the root “lun,” meaning “light,” or its siblings “lum,” “luc,” and “lus.” “Lun” itself shows up in not many words, but this article will still guide you through the words that stem from this root word.

Definition: Lun

The prefix “lun-“ originates from the Latin word “luna,” which refers to the moon itself or the moon goddess. Thus, a word starting with this prefix indicates something that is bright or has something to do with the moon. This root word is used in nouns and adjectives.

Origin

The original Latin word has been “luna” translates to “moon” or “light”. In most words, the “a” at the end is still there, like in “lunatic”. The prefix “lun-” is used to modify nouns, and adjectives, enriching the English language.

Example 

Lun” as in …:

  • Lunambolism (noun)
  • Lunatic (adjective)

“Lunambulism” for example describes a condition of sleepwalking induced by the moon.

Using “lun” in nouns

In linguistics, “lun” is used to something connected to the moon. Examples of nouns incorporating “lun” are illustrated below.

Lunatic…

… is a negatively connotated term for someone, who is deemed insane.

Examples

  • She surely is a lunatic.
  • Yesterday I got called a lunatic for eating pineapple on pizza.

Lunation…

… is another term for a lunar month, dating from one new moon to the next.

Examples

  • The new lunation is starting tomorrow.
  • Some people think that your mental state is connected with the lunation.

Lunette

… describes an object or figure that is crescent-moon-shaped.

Examples

  • That swing over there is shaped like a lunette.
  • I love the shape of lunettes.

Lunambolism…

… describes a condition of sleepwalking induced by the moon.

Examples

  • Have you heard of lunambolism yet?
  • He is suffering from severe lunambolism.

Using “lun” in adjectives

As there are not many words using this prefix, most of the adjectives are related to the previously mentioned nouns.

Lunatic…

… is an adjective to describe a non-normal or insane behavior.

Examples

  • She was lunatic for behaving like that in front of her boss.
  • It is nothing less than lunatic to eat a burger with cutlery.

Lunar…

… is an adjective describing something related to the moon.

Examples

  • I’m always having a lunar calendar on my phone.
  • Some lunar craters can be quite deep.

Lunette…

… describes something, that is crescent-moon-shaped.

Examples

  • I like when the moon is lunette shaped.
  • I saw a gorgeous lunette shaped necklace yesterday.

FAQs

Yes, “lun-” is a Latin-derived prefix meaning “moon” or something that has to do with the moon. It is used in nouns or adjectives.

Here are some examples:

  • Lunatic
  • Lunation
  • Lunette
  • Lunambolism
  • lunar

The root “lun” originates from Latin and means “moon.” The Greek equivalent to the Latin moon goddess Luna would be “Serene,” which is not used in modern languages.

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From

Leonie Schmid

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About the author

Leonie Schmid is studying marketing at IU Nuremberg in a dual program and is working towards a bachelor's degree. She has had a passion for writing ever since she was little, whether it is fiction or later on scientific. Her love for the English language and academic topics has led her to BachelorPrint as a dual student, seeking to provide educational content for students everywhere all around the world.

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Bibliography

Schmid, L. (2025, April 09). Lun (Root Word) – Definition, Origin & Examples. BachelorPrint. https://www.bachelorprint.com/language-rules/root-words/lun/ (retrieved 04.15.2025)

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Schmid, Leonie. 2025. "Lun (Root Word) – Definition, Origin & Examples." BachelorPrint, Retrieved April 15, 2025. https://www.bachelorprint.com/language-rules/root-words/lun/.

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Leonie Schmid, "Lun (Root Word) – Definition, Origin & Examples," BachelorPrint, April 09, 2025, https://www.bachelorprint.com/language-rules/root-words/lun/ (retrieved April 15, 2025).

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Schmid, "Shortened title."

Bibliography

Schmid, Leonie: Lun (Root Word) – Definition, Origin & Examples, in: BachelorPrint, 04.09.2025, [online] https://www.bachelorprint.com/language-rules/root-words/lun/ (retrieved 04.15.2025).

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Full note
Schmid, Leonie: Lun (Root Word) – Definition, Origin & Examples, in: BachelorPrint, 04.09.2025, [online] https://www.bachelorprint.com/language-rules/root-words/lun/ (retrieved 04.15.2025).
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Schmid, 2025.
Indirect quote
Schmid, 2025.

Bibliography

Schmid, Leonie (2025): Lun (Root Word) – Definition, Origin & Examples, in: BachelorPrint, [online] https://www.bachelorprint.com/language-rules/root-words/lun/ (retrieved 04.15.2025).

In-text citation

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(Schmid, 2025)
Indirect quote
(Schmid, 2025)
Narrative
Schmid (2025)

Bibliography

Schmid, Leonie. "Lun (Root Word) – Definition, Origin & Examples." BachelorPrint, 04.09.2025, https://www.bachelorprint.com/language-rules/root-words/lun/ (retrieved 04.15.2025).

In-text citation

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(Schmid)
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Schmid

Bibliography

Number. Schmid L. Lun (Root Word) – Definition, Origin & Examples [Internet]. BachelorPrint. 2025 [cited 04.15.2025]. Available from: https://www.bachelorprint.com/language-rules/root-words/lun/


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