auf vs av, What's the Difference?

Which to use

“auf” is an adverb and “av” is an abbrev - they look or sound alike but fill different roles in a sentence.

#42,318
“auf” frequency rank: #5,821
“av” frequency rank: 48139
confusion score

Side-by-Side Comparison

Feature	auf	av
Definition	aberto	audiovisuel ("audiovisual"):

Letter map: auf vs av

Shared letters muted; letters that set auf and av apart highlighted. Shared run: 1.

3 ch

auf

2 ch

Grammar separator: auf vs av

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: auf is anadverb and avanabbrev. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 48139, derived from the frequency rank of both members and their visual similarity.

auf is recorded at frequency rank #42,318, classified as anadv, pronounced /aʊ̯f/. av is at rank #5,821, tagged as anabbrev.

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 48139, this pair ranks #17,064 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of auf vs av

Shared letters: a. Private to "auf": fu. Private to "av": v.

"auf" · 3 letters · shape VVC · "av" · 2 letters · shape VC

Frequently Asked Questions

Do "auf" and "av" mean the same thing in a sentence?

No - they are not even the same part of speech. "auf" is an adverb and "av" an abbrev, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "auf" or "av"?

"av" is the more common of the two: it sits at frequency rank #5,821 in our Portuguese list, against #42,318 for "auf". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "auf" and "av".

Full dictionary entry for "auf" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "av" - compare definitions side by side with the headword page. Word entry
This pair ranks #17,064 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"auf" and "av" also get mixed up with nearby pairs, the highest-scored neighbour is "acs vs auf". Nearby pair

Confusion rank #17,064 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.