qi vs qui, What's the Difference?

Which to use

“qi” is a noun and “qui” is a pronoun - they look or sound alike but fill different roles in a sentence.

#13,594
“qi” frequency rank: #9,094
“qui” frequency rank: 22688
confusion score

Side-by-Side Comparison

Feature	qi	qui
Definition	conceito usado para indicar energia em sua acepção exotérica	que relativo; o qual, a qual, os quais, as quais

Where the spellings diverge

Shared letters are muted; the letters that actually set qi and qui apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

2 ch

3 ch

qui

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: qi is /tʃi/ while qui is /Ki/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 22688, derived from the frequency rank of both members and their visual similarity.

qi is recorded at frequency rank #13,594, classified as anoun, pronounced /tʃi/. qui is at rank #9,094, tagged as apron, pronounced /Ki/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 22688, this pair ranks #47,307 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of qi vs qui

Shared letters: iq. Private to "qi": -. Private to "qui": u.

"qi" · 2 letters · shape CV · "qui" · 3 letters · shape CVV

Frequency comparison

qi#13,594

qui#9,094

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "qi" and "qui" be used interchangeably?

No - they are not even the same part of speech. "qi" is a noun and "qui" a pronoun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "qi" or "qui"?

"qui" is the more common of the two: it sits at frequency rank #9,094 in our Portuguese list, against #13,594 for "qi". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering qi vs qui

The fastest way to pick the right one every time.

Check the role first: if you need a noun, it's “qi”; for a pronoun, it's “qui”.
See each word in full, definition, IPA, etymology and its other confusables. Full “qi” entry
Browse more pairs most likely to be confused. Most confusable