HaivshuiTell them apart

Quick tell: Hai is a noun, hui is an adverb, so they fill different roles in a sentence.

Which to use

“Hai” is a noun and “hui” is an adverb - they look or sound alike but fill different roles in a sentence.

#31,805
“Hai” frequency rank
#41,055
“hui” frequency rank
72860
confusion score

Side-by-Side Comparison

Feature Hai hui
Definition tubarão hoje

Letter map: Hai vs hui

Shared letters muted; letters that set Hai and hui apart highlighted. Shared run: 2.

3 ch
Hai
3 ch
hui

Role in the sentence - Hai and hui

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Hai is anoun and huianadverb. On the page they differ by a single letter - a in “Hai” becomes u in “hui”. Our composite confusion score for this pair is 72860, derived from the frequency rank of both members and their visual similarity.

Hai is recorded at frequency rank #31,805, classified as anoun, pronounced /haɪ̯/ ouvir^(fonte ?). hui is at rank #41,055, tagged as anadv.

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 72860, this pair ranks #2,926 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of Hai vs hui

Shared letters: hi. Private to "Hai": a. Private to "hui": u.

"Hai" · 3 letters · shape CVV  ·  "hui" · 3 letters · shape CVV

Frequently Asked Questions

Can "Hai" and "hui" be used interchangeably?
No - they are not even the same part of speech. "Hai" is a noun and "hui" an adverb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "Hai" or "hui"?
"Hai" is the more common of the two: it sits at frequency rank #31,805 in our Portuguese list, against #41,055 for "hui". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

You've compared "Hai" and "hui". Here's where to go from here.

  • Full dictionary entry for "Hai" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "hui" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #2,926 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "Hai" and "hui" also get mixed up with nearby pairs, the highest-scored neighbour is "hui vs Hut". Nearby pair

Confusion rank #2,926 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list