How do you pronounce Deimos?

In British English, it's /ˈdeɪmɒs/ (DAY-moss). In American English, it's commonly /ˈdaɪməs/ (DYE-muss).

Is Deimos bigger than Phobos?

No, Deimos is the smaller and more distant of Mars's two moons.

What does the name Deimos mean in Greek?

In Greek, 'Deimos' (Δεῖμος) means 'dread' or 'terror'. In mythology, he was the god who personified these feelings.

Can 'Deimos' be used as a common noun?

No, in modern English it is exclusively a proper noun referring to the specific moon or mythological figure.

deimos

Low

UK/ˈdeɪmɒs/US/ˈdaɪməs/

Specialized/Scientific

My Flashcards

Definition

Meaning

The smaller and outer of the two natural satellites of the planet Mars.

In Greek mythology, Deimos is the personification of terror and dread, a son of Ares (Mars) and Aphrodite.

Linguistics

Semantic Notes

The astronomical term is a proper noun and is capitalised. The mythological figure is also a proper noun. In common usage, it is almost exclusively a proper noun referring to the moon.

Dialectal Variation

British vs American Usage

Differences

None. Both treat it as a proper noun.

Connotations

No differential connotations.

Frequency

Extremely low frequency in general discourse in both regions, used almost solely in astronomical contexts.

Vocabulary

Collocations

strong

of Marsand Phobos

medium

moonsatelliteorbit

weak

tinyouterastronomical

Grammar

Valency Patterns

[Proper Noun]

Vocabulary

Synonyms

Neutral

Martian moonsatellite of Mars

Weak

celestial body

Vocabulary

Antonyms

Phobos (in terms of being the other Martian moon, not a true antonym)

Usage

Context Usage

Business

Virtually unused.

Academic

Used in astronomy, planetary science, and classical studies.

Everyday

Rare, found only in discussions of space or mythology.

Technical

Standard term in astronomy.

Examples

By CEFR Level

Look at the picture of Mars and its two moons, Phobos and Deimos.

Deimos is much smaller than our Moon and orbits Mars every 30 hours.

The irregular shape of Deimos suggests it may be a captured asteroid from the distant past.

Scientific probes have provided detailed imagery of Deimos, enabling precise calculations of its orbital mechanics.

Learning

Memory Aids

Mnemonic

Deimos sounds like 'demos' – think of a tiny, distant 'demon' moon orbiting Mars.

Conceptual Metaphor

CHANGE IS MOVEMENT (its orbit), FEAR IS A PHYSICAL ENTITY (mythological).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Do not confuse with common nouns. In Russian, 'Деймос' is a direct transliteration and carries the same specific meaning.

Common Mistakes

Misspelling as 'Deimos' without capitalisation in astronomical contexts, mispronouncing with a hard 'D' as in 'dog'.

Practice

Quiz

Fill in the gap

The smaller, outer moon of Mars is named .

Multiple Choice

What is Deimos primarily known as?

FAQ

Frequently Asked Questions

: In British English, it's /ˈdeɪmɒs/ (DAY-moss). In American English, it's commonly /ˈdaɪməs/ (DYE-muss).
: No, Deimos is the smaller and more distant of Mars's two moons.
: In Greek, 'Deimos' (Δεῖμος) means 'dread' or 'terror'. In mythology, he was the god who personified these feelings.
: No, in modern English it is exclusively a proper noun referring to the specific moon or mythological figure.