afivsaufWhat's the difference?

Quick tell: afi is a noun, auf is an adverb, so they fill different roles in a sentence.

Which to use

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

#41,804
“afi” frequency rank
#42,318
“auf” frequency rank
84122
confusion score

Side-by-Side Comparison

Feature afi auf
Definition avô. aberto

Where the spellings diverge

Shared letters are muted; the letters that actually set afi and auf apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

3 ch
afi
3 ch
auf

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: afi is [ˈaːvɪ], Plural: [ˈaːvar̥] 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 (noun vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 84122, derived from the frequency rank of both members and their visual similarity.

afi is recorded at frequency rank #41,804, classified as anoun, pronounced [ˈaːvɪ], Plural: [ˈaːvar̥]. 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 84122, this pair ranks #834 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of afi vs auf

Shared letters: af. Private to "afi": i. Private to "auf": u.

"afi" · 3 letters · shape VCV  ·  "auf" · 3 letters · shape VVC

Frequency comparison

afi#41,804
auf#42,318

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "afi" and "auf" be used interchangeably?
No - they are not even the same part of speech. "afi" is a noun and "auf" an adverb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "afi" or "auf"?
"afi" is the more common of the two: it sits at frequency rank #41,804 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.

Remembering afi vs auf

The fastest way to pick the right one every time.

  • Check the role first: if you need a noun, it's “afi”; for an adverb, it's “auf”.
  • See each word in full, definition, IPA, etymology and its other confusables. Full “afi” entry
  • Browse more pairs most likely to be confused. Most confusable

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list