fixvsfuiTell them apart

Which to use

“fix” and “fui” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#40,843
“fix” frequency rank
#852
“fui” frequency rank
41695
confusion score

Side-by-Side Comparison

Feature fix fui
Definition Fijar. Primera persona del singular (yo) del pretérito perfecto simple de indicativo de ser.

Where the eye mixes fix and fui

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch
fix
3 ch
fui

Visual trap between fix and fui

A purely visual mix-up. fix (/fɪks/) and fui ([ˈfwi]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 41695, derived from the frequency rank of both members and their visual similarity.

fix is recorded at frequency rank #40,843, classified as averb, pronounced /fɪks/. fui is at rank #852, tagged as averb, pronounced [ˈfwi].

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 41695, this pair ranks #152,237 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of fix vs fui

Shared letters: fi. Private to "fix": x. Private to "fui": u.

"fix" · 3 letters · shape CVC  ·  "fui" · 3 letters · shape CVV

Frequently Asked Questions

Is swapping "fix" for "fui" ever safe?
No. They are said differently (/fɪks/ versus [ˈfwi]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "fix" or "fui"?
"fui" is the more common of the two: it sits at frequency rank #852 in our Spanish list, against #40,843 for "fix". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "fix" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fui" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #152,237 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "fix" and "fui" also get mixed up with nearby pairs, the highest-scored neighbour is "fix vs fua". Nearby pair

Confusion rank #152,237 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