eir

/ɛɹ/

//ɛɹ// det

"eir" is a 3-letter English headword indexed on PlainSpell.

The verdict

“eir” is uncommon English (frequency #60,787 among 2,246 “E” headwords), classed as a determiner. The kind of spelling people second-guess.

#60,787
frequency rank, English
2,246
“E” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Belonging to em, gender-neutral third-person singular possessive adjective, equivalent to the singular their and coordinate with his and her.

Corpus desk

Index EN-eir · eir · English

eir · rank #60,787 · 0 variants · 0 confusables

  • FREQ-RARE #60,787
  • LEN-MID 3 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,246
  • PHOTO-FINISH eigenvalue

Nearest frequency peer: eigenvalue (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Long-tail ranks near “eir”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “eir” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for eir
PropertyValue
Headwordeir
LanguageEnglish
Part of speechDeterminer
IPA/ɛɹ/
Letters3
Frequency rank#60,787
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “eir” in English

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

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Rare peers in the same band: “eigenvalue” (#60,786), “Eldar” (#60,788), “egoism” (#60,785). Among 2,246 “E” headwords, “eir” is #60,787. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

eir is uncommon English at frequency #60,787 among 2,246 “E” headwords, classed as adeterminer, transcribed /ɛɹ/. Rarity is why readers land here mid-draft. Gloss: "Belonging to em, gender-neutral third-person singular possessive adjective, equivalent to the singular their and coordinate with his and her.".

No misspelling variants are generated for eir in our index, typically a sign the spelling maps closely to how the word sounds. Our dataset records no confusable match here, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: Coined by Christine M. Elverson by removing "th" from their. The correct English form is eir, spelled E-I-R.

Definition

  1. 1
    Belonging to em, gender-neutral third-person singular possessive adjective, equivalent to the singular their and coordinate with his and her.

Recorded use

Wiktionary examples

These source excerpts show how eir appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Eir sentences would sound smoother since ey wouldn’t clutter them with the old sexist pronouns. And if ey should trip up in the new usage, ey would only have emself to blame.
  2. A person whose habit is to stand and walk splay-footed may *think* eir feet are straight ahead, when they are actually pointed only slightly less out.

Etymology

Coined by Christine M. Elverson by removing "th" from their.

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 "eir"?
"eir" is spelled E-I-R. The IPA pronunciation is /ɛɹ/.
What does "eir" mean?
As a determiner, "eir" means: Belonging to em, gender-neutral third-person singular possessive adjective, equivalent to the singular their and coordinate with his and her.
How do you pronounce "eir"?
The IPA (International Phonetic Alphabet) transcription for "eir" is /ɛɹ/. 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 "eir"?
Coined by Christine M. Elverson by removing "th" from their. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "eir", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list