chi

/kaɪ/

//kaɪ// noun

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

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

The verdict

“chi” sits in 20 confusable pairs (corpus #7,660) as a noun. The look-alike neighbours are the real trap.

#7,660
frequency rank, English
5,599
“C” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The twenty-second letter of the Classical and Modern Greek alphabets.

Corpus desk

Index EN-chi · chi · English

chi · rank #7,660 · 0 variants · 20 confusables

  • FREQ-COMMON #7,660
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH ch

Nearest frequency peer: ch (-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.

Frequency neighbours of confusable “chi”

Peers at similar corpus weight, separate from look-alike pairs below

corpus weight

What this shows Bars place “chi” against nearest ranked English headwords, not a reprint of the confusable-pair desk.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

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

chi vs co
33% similar
chi vs CM
0% similar
chi vs CT
0% similar

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

Key facts for chi
PropertyValue
Headwordchi
LanguageEnglish
Part of speechNoun
IPA/kaɪ/
Letters3
Frequency rank#7,660
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Corpus rank beside confusables of “chi”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).chilands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “ch” (#7,659), “col” (#7,661), “cab” (#7,658). Among 5,599 “C” headwords, “chi” is #7,660. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for chi is neighbouring look-alikes ("co", "CM", …), not just typos; it is anoun pronounced /kaɪ/. Frequency #7,660 among 5,599 “C” headwords. Gloss: "The twenty-second letter of the Classical and Modern Greek alphabets.".

We couldn't generate a plausible misspelling set for chi, a straightforward case of a spelling with little room for common typos. It also participates in 20 confusable-pair relationships, "co", "CM", "CT", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Latin chī, from Ancient Greek χεῖ (kheî). The correct English form is chi, spelled C-H-I.

Definition

  1. 1
    The twenty-second letter of the Classical and Modern Greek alphabets.

Etymology

From Latin chī, from Ancient Greek χεῖ (kheî).

This word in other languages

ji(Español)chi(Français)Chi(Deutsch)qui(Português)

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 "chi"?
"chi" is spelled C-H-I. The IPA pronunciation is /kaɪ/.
What does "chi" mean?
As a noun, "chi" means: The twenty-second letter of the Classical and Modern Greek alphabets.
What words are commonly confused with "chi"?
"chi" is commonly confused with "co", "CM", "CT". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "chi"?
The IPA (International Phonetic Alphabet) transcription for "chi" is /kaɪ/. 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 "chi"?
From Latin chī, from Ancient Greek χεῖ (kheî). 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 "chi", not the corpus desk frequency band.

Same letter count

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

col#7,661cab#7,658wit#7,637tab#7,620

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

Source: FrequencyWords open word-frequency list