i.e.

/ˌaɪˈiː/

//ˌaɪˈiː// adv

By · According to Wiktionary data (CC BY-SA) ·

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

The verdict

“i.e.” is uncommon English (outside the top frequency list), classed as an adverb. The kind of spelling people second-guess.

Unranked
below top-frequency English
4
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - That is, namely, in other words, that is to say.

Corpus desk

Index EN-i-e · i.e. · English

i.e. · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "I" thin
  • PHOTO-UNK Peer pending

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.

Key facts for i.e.
PropertyValue
Headwordi.e.
LanguageEnglish
Part of speechAdverb
IPA/ˌaɪˈiː/
Letters4
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “i.e.” in English

i.e.ranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

i.e. is uncommon English outside the top frequency list, classed as anadverb, transcribed /ˌaɪˈiː/. Rarity is why readers land here mid-draft. Gloss: "That is, namely, in other words, that is to say.".

We couldn't generate a plausible misspelling set for i.e., a straightforward case of a spelling with little room for common typos. No confusable counterpart is on file for this word, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From Latin i. e., an abbreviation of id est (“that is”). The correct English form is i.e., spelled I-.-E-..

Definition

  1. 1
    That is, namely, in other words, that is to say.

Recorded use

Wiktionary examples

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

  1. While the final episode was made, the show itself was immediately cancelled after the penultimate episode i.e. the final episode never aired.
  2. [N]o drunkard (i.e.) no Habituall, Impenitent drunkard, ſhall come into Gods Kingdome.

Etymology

From Latin i. e., an abbreviation of id est (“that is”).

This word in other languages

es decir(Español)c.-à-d.(Français)d. h.(Deutsch)isto é(Português)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "i.e."?
"i.e." is spelled I-.-E-.. The IPA pronunciation is /ˌaɪˈiː/.
What does "i.e." mean?
As an adverb, "i.e." means: That is, namely, in other words, that is to say.
How do you pronounce "i.e."?
The IPA (International Phonetic Alphabet) transcription for "i.e." is /ˌaɪˈiː/. 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 "i.e."?
From Latin i. e., an abbreviation of id est (“that is”). 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.

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

Source: FrequencyWords open word-frequency list