Which to use
“air” is an adjective and “auf” is an adverb - they look or sound alike but fill different roles in a sentence.
- #6,609
- “air” frequency rank
- #42,318
- “auf” frequency rank
- 48927
- confusion score
Side-by-Side Comparison
| Feature | air | auf |
|---|---|---|
| Definition | aéreo | aberto |
Where the eye mixes air and auf
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. air and auf follow the identical consonant-vowel pattern (VVC). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between air and auf
These two trip readers on the page rather than in the ear: air is /ˈɛɹ/ while auf is /aʊ̯f/. 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 (adjective vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 48927, derived from the frequency rank of both members and their visual similarity.
air is recorded at frequency rank #6,609, classified as anadj, pronounced /ˈɛɹ/. auf is at rank #42,318, tagged as anadv, pronounced /aʊ̯f/.
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 48927, this pair ranks #16,188 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of air vs auf
Shared letters: a. Private to "air": ir. Private to "auf": fu.
"air" · 3 letters · shape VVC · "auf" · 3 letters · shape VVC
Frequently Asked Questions
Do "air" and "auf" mean the same thing in a sentence?
In ordinary Portuguese text, does "air" or "auf" show up more?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "air" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "auf" - compare definitions side by side with the headword page. Word entry
- This pair ranks #16,188 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "air" and "auf" also get mixed up with nearby pairs, the highest-scored neighbour is "acs vs auf". Nearby pair
Confusion rank #16,188 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.