ex

/ɛks/

//ɛks// noun

"ex" is a 2-letter English headword indexed on PlainSpell.

The verdict

“ex” is a regularly-used English word, ranked #1,633 in English word frequency and used as a noun.

#1,633
frequency rank, English
2
letters
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The name of the Latin script letter X/x.

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

ex vs ey
50% similar
ex vs ez
50% similar
ex vs eye
33% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for ex
PropertyValue
Headwordex
LanguageEnglish
Part of speechNoun
IPA/ɛks/
Letters2
Frequency rank#1,633
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “ex” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). ex lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for ex is 2 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ɛks/. Corpus data places it at rank #1,633 in overall English word frequency, indicating it appears regularly in written and spoken text. The dominant gloss from Wiktionary reads: "The name of the Latin script letter X/x.".

No generated misspelling entries exist for ex in our index, a straightforward case of a spelling with little room for common typos. It also participates in 20 confusable-pair relationships, "ey", "ez", "eye", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Latin ex. The correct English form is ex, spelled E-X.

Definition

  1. 1
    The name of the Latin script letter X/x.

Etymology

From Latin ex.

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "ex"?
"ex" is spelled E-X. The IPA pronunciation is /ɛks/.
What does "ex" mean?
As a noun, "ex" means: The name of the Latin script letter X/x.
What words are commonly confused with "ex"?
"ex" is commonly confused with "ey", "ez", "eye". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "ex"?
The IPA (International Phonetic Alphabet) transcription for "ex" is /ɛks/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "ex"?
From Latin ex. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “ex”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is E-X - every other letter order is a misspelling in standard orthography.
  • Say it as /ɛks/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “ey” - see the side-by-side comparison. ex vs ey
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list