aux vs ayo, What's the Difference?

Which to use

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

#32,511
“aux” frequency rank: #45,145
“ayo” frequency rank: 77656
confusion score

Side-by-Side Comparison

Feature	aux	ayo
Definition	Contracción de la preposición à y el artículo les; a las ; a los.	Persona encargada del cuidado y educación de los niños en los hogares pudientes.

Where the spellings diverge

Shared letters are muted; the letters that actually set aux and ayo apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

3 ch

aux

3 ch

ayo

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: aux is /o/ while ayo is [ˈaʝo]. 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 (contraction vs noun), which is usually the fastest check. Our composite confusion score for this pair is 77656, derived from the frequency rank of both members and their visual similarity.

aux is recorded at frequency rank #32,511, classified as acontraction, pronounced /o/. ayo is at rank #45,145, tagged as anoun, pronounced [ˈaʝo].

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 77656, this pair ranks #15,655 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of aux vs ayo

Shared letters: a. Private to "aux": ux. Private to "ayo": oy.

"aux" · 3 letters · shape VVC · "ayo" · 3 letters · shape VVV

Frequency comparison

aux#32,511

ayo#45,145

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

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

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

Which is more common, "aux" or "ayo"?

"aux" is the more common of the two: it sits at frequency rank #32,511 in our Spanish list, against #45,145 for "ayo". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering aux vs ayo

The fastest way to pick the right one every time.

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