meinvsmuiTell them apart

Quick tell: mein is a pronoun, mui is an adverb, so they fill different roles in a sentence.

Which to use

“mein” is a pronoun and “mui” is an adverb - they look or sound alike but fill different roles in a sentence.

#36,545
“mein” frequency rank
#23,741
“mui” frequency rank
60286
confusion score

Side-by-Side Comparison

Feature mein mui
Definition meu, minha, pronome possessivo da primeira pessoa do singular: em alto grau

Where the eye mixes mein and mui

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. mein runs 4 letters (CVVC) against mui's 3 (CVV) - the length gap alone is often enough to separate them once you know to check it.

4 ch
mein
3 ch
mui

Look-alike desk: mein vs mui

These two trip readers on the page rather than in the ear: mein is /maɪ̯n/ ouvir^(fonte ?) while mui is /ˈmũj/. 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 (pronoun vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 60286, derived from the frequency rank of both members and their visual similarity.

mein is recorded at frequency rank #36,545, classified as apron, pronounced /maɪ̯n/ ouvir^(fonte ?). mui is at rank #23,741, tagged as anadv, pronounced /ˈmũj/.

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 60286, this pair ranks #7,723 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of mein vs mui

Shared letters: im. Private to "mein": en. Private to "mui": u.

"mein" · 4 letters · shape CVVC  ·  "mui" · 3 letters · shape CVV

Known mistypes of this pair

  • mein ← emin · meinn · meni · mmein

Frequently Asked Questions

Is swapping "mein" for "mui" ever safe?
No - they are not even the same part of speech. "mein" is a pronoun and "mui" an adverb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "mein" or "mui" show up more?
"mui" is the more common of the two: it sits at frequency rank #23,741 in our Portuguese list, against #36,545 for "mein". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "mein" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "mui" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #7,723 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "mein" and "mui" also get mixed up with nearby pairs, the highest-scored neighbour is "mein vs mens". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #7,723 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