aún vs aux, What's the Difference?

Which to use

“aún” is an adverb and “aux” is a contraction - they look or sound alike but fill different roles in a sentence.

#240
“aún” frequency rank: #32,511
“aux” frequency rank: 32751
confusion score

Side-by-Side Comparison

Feature	aún	aux
Definition	Indica que el hecho persiste en el presente, aunque pueda cambiar en lo sucesivo..	Contracción de la preposición à y el artículo les; a las ; a los.

Where the eye mixes aún and aux

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

aún

3 ch

aux

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: aún is [aˈũn] while aux is /o/. 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 (adverb vs contraction), which is usually the fastest check. Our composite confusion score for this pair is 32751, derived from the frequency rank of both members and their visual similarity.

aún is recorded at frequency rank #240, classified as anadv, pronounced [aˈũn]. aux is at rank #32,511, tagged as acontraction, pronounced /o/.

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 32751, this pair ranks #200,389 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of aún vs aux

Shared letters: a. Private to "aún": nú. Private to "aux": ux.

"aún" · 3 letters · shape VVC · "aux" · 3 letters · shape VVC

Frequently Asked Questions

Can "aún" and "aux" be used interchangeably?

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

Which is more common, "aún" or "aux"?

"aún" is the more common of the two: it sits at frequency rank #240 in our Spanish list, against #32,511 for "aux". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

You've compared "aún" and "aux". Here's where to go from here.

Full dictionary entry for "aún" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "aux" - compare definitions side by side with the headword page. Word entry
This pair ranks #200,389 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
"aún" and "aux" also get mixed up with nearby pairs, the highest-scored neighbour is "atl vs aux". Nearby pair

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.