nadvsneiWhich spelling fits?

Quick tell: nad is a preposition, nei is a verb, so they fill different roles in a sentence.

Which to use

“nad” is a preposition and “nei” is a verb - they look or sound alike but fill different roles in a sentence.

#33,954
“nad” frequency rank
#27,191
“nei” frequency rank
61145
confusion score

Side-by-Side Comparison

Feature nad nei
Definition em cima, acima de negar

Where the eye mixes nad and nei

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. nad (CVC) and nei (CVV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch
nad
3 ch
nei

Why the eye confuses nad with nei

These two trip readers on the page rather than in the ear: nad is /ˈnat/ ouvir^(fonte ?) while nei is /ˈnɛ.i/.. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (preposition vs verb), which is usually the fastest check. Our composite confusion score for this pair is 61145, derived from the frequency rank of both members and their visual similarity.

nad is recorded at frequency rank #33,954, classified as aprep, pronounced /ˈnat/ ouvir^(fonte ?). nei is at rank #27,191, tagged as averb, pronounced /ˈnɛ.i/..

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 61145, this pair ranks #7,283 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of nad vs nei

Shared letters: n. Private to "nad": ad. Private to "nei": ei.

"nad" · 3 letters · shape CVC  ·  "nei" · 3 letters · shape CVV

Frequently Asked Questions

Can "nad" and "nei" be used interchangeably?
No - they are not even the same part of speech. "nad" is a preposition and "nei" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "nad" or "nei" show up more?
"nei" is the more common of the two: it sits at frequency rank #27,191 in our Portuguese list, against #33,954 for "nad". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "nad" and "nei" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "nad" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "nei" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #7,283 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "nad" and "nei" also get mixed up with nearby pairs, the highest-scored neighbour is "nad vs nadie". Nearby pair

Confusion rank #7,283 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