zi vs zu, What's the Difference?

Which to use

“zi” is an adjective and “zu” is a preposition - they look or sound alike but fill different roles in a sentence.

#33,522
“zi” frequency rank: #22,460
“zu” frequency rank: 55982
confusion score

Side-by-Side Comparison

Feature	zi	zu
Definition	Noir.	À, chez, vers, en direction de, Indique la direction, le déplacement (sens directionnel).

Letter map: zi vs zu

Shared letters muted; letters that set zi and zu apart highlighted. Shared run: 1.

2 ch

Part-of-speech tell for zi / zu

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: zi is anadjective and zuapreposition. On the page they differ by a single letter - i in “zi” becomes u in “zu”. Our composite confusion score for this pair is 55982, derived from the frequency rank of both members and their visual similarity.

zi is recorded at frequency rank #33,522, classified as anadj. zu is at rank #22,460, tagged as aprep, pronounced \t͡suː\.

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 55982, this pair ranks #123,952 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of zi vs zu

Shared letters: z. Private to "zi": i. Private to "zu": u.

"zi" · 2 letters · shape CV · "zu" · 2 letters · shape CV

Frequently Asked Questions

Do "zi" and "zu" mean the same thing in a sentence?

No - they are not even the same part of speech. "zi" is an adjective and "zu" a preposition, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "zi" or "zu"?

"zu" is the more common of the two: it sits at frequency rank #22,460 in our French list, against #33,522 for "zi". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "zi" and "zu". Here's where to go from here.

Full dictionary entry for "zi" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "zu" - compare definitions side by side with the headword page. Word entry
This pair ranks #123,952 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"zi" and "zu" also get mixed up with nearby pairs, the highest-scored neighbour is "zap vs zi". Nearby pair

Confusion rank #123,952 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.