mivsmuyTell them apart

Quick tell: mi is a adjective, muy is an adverb, so they fill different roles in a sentence.

Which to use

“mi” is an adjective and “muy” is an adverb - they look or sound alike but fill different roles in a sentence.

#29
“mi” frequency rank
#46
“muy” frequency rank
75
confusion score

Side-by-Side Comparison

Feature mi muy
Definition Adjetivo posesivo de la primera persona singular; de mí. Expresa grado intenso, extenso o de abundancia de la característica del adjetivo o adverbio al que precede y es caracterizado como un adverbio de cantidad o modo..

Where the eye mixes mi and muy

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

2 ch
mi
3 ch
muy

Visual trap between mi and muy

These two trip readers on the page rather than in the ear: mi is [mi] while muy is [ˈmuj]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 75, derived from the frequency rank of both members and their visual similarity.

mi is recorded at frequency rank #29, classified as anadj, pronounced [mi]. muy is at rank #46, tagged as anadv, pronounced [ˈmuj].

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 75, this pair ranks #323,795 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of mi vs muy

Shared letters: m. Private to "mi": i. Private to "muy": uy.

"mi" · 2 letters · shape CV  ·  "muy" · 3 letters · shape CVV

Frequently Asked Questions

Can "mi" and "muy" be used interchangeably?
No - they are not even the same part of speech. "mi" is an adjective and "muy" an adverb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "mi" or "muy"?
"mi" is the more common of the two: it sits at frequency rank #29 in our Spanish list, against #46 for "muy". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "mi" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "muy" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #323,795 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "mi" and "muy" also get mixed up with nearby pairs, the highest-scored neighbour is "mur vs muy". Nearby pair

Confusion rank #323,795 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list