Chi or ki?
chi is a noun meaning “The twenty-second letter of the Classical and Modern Greek alphabets”; ki is a noun meaning “A term indicating intrinsic energy; usually associated with martial art –…”. In written English (wordfreq, 2021 data) chi is about as common as ki.
What is the difference between chi and ki?
| chi | ki | |
|---|---|---|
| Part of speech | noun | noun, infix |
| Meaning | The twenty-second letter of the Classical and Modern Greek alphabets A life force in traditional Chinese philosophy, culture, medicine, etc, related (but not limited) to breath and circulation The Chinese foot, a traditional Chinese unit of length based on the human forearm | A term indicating intrinsic energy; usually associated with martial art – karate, judo, aikido, etc. – practitioners who consider ki important to performing at… A plant native to the Pacific islands and China (Cordyline fruticosa); ti a shortened allomorph of the monoclonal antibody affix -kin-, used before the affixes -xi- and -zu- for ease of pronunciation |
| Example | none recorded | none recorded |
| Forms | chis | kis |
| Pronunciation | /kaɪ/ /t͡ʃiː/ /t͡ʃə/ | /kiː/ |
| In writing | 8.9 times per million words | 7.6 times per million words |
Sources: chi and ki in the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Every current meaning of chi and ki
chi
- 1
The twenty-second letter of the Classical and Modern Greek alphabets
- 2
A life force in traditional Chinese philosophy, culture, medicine, etc, related (but not limited) to breath and circulation
- 3
The Chinese foot, a traditional Chinese unit of length based on the human forearm
- 4
Clipping of chihuahua
- 5
informalClipping of Chihuahua
- 6
Abbreviation of Chicago: a city in Illinois, United States
- 7
The Chinese unit of length standardized in 1984 as ¹/₃ of a meter
- 8
The Taiwanese unit of length standardized as ¹⁰/₃₃ of a meter, identical to the Japanese shaku
ki
- 1
A term indicating intrinsic energy; usually associated with martial art – karate, judo, aikido, etc. – practitioners who consider ki important to performing at the highest level
- 2
A plant native to the Pacific islands and China (Cordyline fruticosa); ti
- 3
Alternative form of key (a kilogram)
- 4
UKslangAlternative form of kye (“cocoa”)
- 5
Alternative form of chi
- 6
a shortened allomorph of the monoclonal antibody affix -kin-, used before the affixes -xi- and -zu- for ease of pronunciation
Source: the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); obsolete, archaic, dialect and rare senses left out.
Which is more common, chi or ki?
chi appears 8.9 times per million words; ki 7.6 times per million words.
chi 8.9 times per million wordski 7.6 times per million words
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How many people search chi vs ki?
“chi vs ki” is searched about 70 times a month on Google and 10 on Bing in the United States. Google counts close variants of a query together (“ki vs chi”, “chi or ki”).
Sources: Google Ads keyword data through DataForSEO and Microsoft Advertising keyword data through DataForSEO, the average month from September 2025 to August 2026.