auffassenvsaufpassenWhich spelling fits?

Which to use

“auffassen” and “aufpassen” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#35,068
“auffassen” frequency rank
#5,243
“aufpassen” frequency rank
40311
confusion score

Side-by-Side Comparison

Feature auffassen aufpassen
Definition etwas einfach nur (neutral) verstehen und begreifen etwas aufmerksam verfolgen

Where the eye mixes auffassen and aufpassen

Muted = shared; highlighted = the visual trap. They share 8 letters in sequence. auffassen and aufpassen follow the identical consonant-vowel pattern (VVCCVCCVC). Same shape at a glance is often the real trap, independent of shared letters.

9 ch
auffassen
9 ch
aufpassen

Visual trap between auffassen and aufpassen

A purely visual mix-up. auffassen ([ˈaʊ̯fˌfasn̩]) and aufpassen ([ˈaʊ̯fˌpasn̩]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - f in “auffassen” becomes p in “aufpassen”. Our composite confusion score for this pair is 40311, derived from the frequency rank of both members and their visual similarity.

auffassen is recorded at frequency rank #35,068, classified as averb, pronounced [ˈaʊ̯fˌfasn̩]. aufpassen is at rank #5,243, tagged as averb, pronounced [ˈaʊ̯fˌpasn̩].

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 40311, this pair ranks #1,512,113 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of auffassen vs aufpassen

Shared letters: aefnsu. Private to "auffassen": -. Private to "aufpassen": p.

"auffassen" · 9 letters · shape VVCCVCCVC  ·  "aufpassen" · 9 letters · shape VVCCVCCVC

Known mistypes of this pair

  • auffassen ← afufassen · aufafssen · aufassen · auffasen · auffasesn · auffassenn · auffassne · auffaßen
  • aufpassen ← afupassen · aufapssen · auffpassen · aufpasen · aufpasesn · aufpassenn · aufpassne · aufpaßen

Frequently Asked Questions

Is swapping "auffassen" for "aufpassen" ever safe?
No. They are said differently ([ˈaʊ̯fˌfasn̩] versus [ˈaʊ̯fˌpasn̩]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary German text, does "auffassen" or "aufpassen" show up more?
"aufpassen" is the more common of the two: it sits at frequency rank #5,243 in our German list, against #35,068 for "auffassen". 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 "auffassen" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "aufpassen" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,512,113 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "auffassen" and "aufpassen" also get mixed up with nearby pairs, the highest-scored neighbour is "aufessen vs auffassen". 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 #1,512,113 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list